How to Find the Best Knife Sharpener

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Everyone has knives in their kitchen, and those knives need constant sharpening to stay at their sharpest and get the job done right. Whether you’re new to the struggle of keeping knives sharp, or you’ve been battling with this issue for a while, you’ve come to the right place.

We’ve spent years researching and finding the best kitchen knife sharpener. We’ve tried electric sharpeners, honing rods, and sharpening stones. We’ve tried the best cheap knife sharpeners, as well as professional knife sharpeners. 

best knife sharpeners

In the end it’s all about the ability to slice, chop and dice with ease in the kitchen and that requires proper knife maintenance and sharpening, which you can read about in depth here.

We won’t go into the best practices for keeping knifes sharp, we’ll say that it’s incredibly important for good results from your knifes, especially if you’ve invested in a good knife set, that should last for many, many years with proper care.

Find the Best Knife Sharpener for You

Half the battle of keeping your knifes sharp is understanding the options and choosing the one that’s right for you. Since there are many different options, it’s difficult to tell you what is the best knife sharpener.

This guide will explain the pros and cons of the top knife sharpening options, and we’ll provide a chart of the best rated knife sharpener in each category.

To help you find the top knife sharpeners, we’ve chosen our 8 favorite types of knife sharpeners from the overwhelming amount of kitchen knife sharpeners out there and we’ve listed all the key information from the reviewed knife sharpeners is in the comparison table below.

For me, the best test of a knife’s sharpness is how easily if can cut through the skin of a tomato, so that is the test we’ve held each of these products up to. How many times have you tried to cut through a tomato and realized your knives are not as sharp as you need them to be.

You won’t have to deal with that problem any more once you’ve read our reviews and decided on the best knife sharpener for you.

Chef’sChoice Trizor 15XV Professional Electric Knife Sharpener for Kitchen Knives with Diamond Abrasives and Precision Angle Guides, 75db, 3 Slots, Gray
Chef'sChoice Hone Electric Knife Sharpener for 15 and 20-Degree Knives 100% Diamond Abrasive Stropping Precision Guides for Straight and Serrated Edges, 3-Stage, Gray
Chef'sChoice 4643 Manual Knife Sharpeners 15 and 20-Degree for Serrated and Straight Knives Diamond Abrasives, 2-Stage, Gray
Chef’sChoice Trizor 15XV Professional Electric Knife Sharpener for Kitchen Knives with Diamond Abrasives and Precision Angle Guides, 75db, 3 Slots, Gray
Chef'sChoice Hone Electric Knife Sharpener for 15 and 20-Degree Knives 100% Diamond Abrasive Stropping Precision Guides for Straight and Serrated Edges, 3-Stage, Gray
Chef'sChoice 4643 Manual Knife Sharpeners 15 and 20-Degree for Serrated and Straight Knives Diamond Abrasives, 2-Stage, Gray
Amazon Prime
Amazon Prime
Amazon Prime
Chef’sChoice Trizor 15XV Professional Electric Knife Sharpener for Kitchen Knives with Diamond Abrasives and Precision Angle Guides, 75db, 3 Slots, Gray
Chef’sChoice Trizor 15XV Professional Electric Knife Sharpener for Kitchen Knives with Diamond Abrasives and Precision Angle Guides, 75db, 3 Slots, Gray
Amazon Prime
Chef'sChoice Hone Electric Knife Sharpener for 15 and 20-Degree Knives 100% Diamond Abrasive Stropping Precision Guides for Straight and Serrated Edges, 3-Stage, Gray
Chef'sChoice Hone Electric Knife Sharpener for 15 and 20-Degree Knives 100% Diamond Abrasive Stropping Precision Guides for Straight and Serrated Edges, 3-Stage, Gray
Amazon Prime
Chef'sChoice 4643 Manual Knife Sharpeners 15 and 20-Degree for Serrated and Straight Knives Diamond Abrasives, 2-Stage, Gray
Chef'sChoice 4643 Manual Knife Sharpeners 15 and 20-Degree for Serrated and Straight Knives Diamond Abrasives, 2-Stage, Gray
Amazon Prime

How to Choose a Knife Sharpening Method

Each of the blade sharpening tools we’ll discuss here has its own pros and cons. In fact, each user is likely to find their own set of pros and cons with each method.

There’s no right way for everyone. You want to look for the method that suits you best, whether it be a manual kitchen knife sharpener, a fully functional professional electric knife sharpener, or a sharpening stone.

That said, some methods just produce a better result, thus we will focus on those methods.

Criteria for Choosing the Best Home Knife Sharpener

  • Type of sharpening mechanism: There are two key factors that you should look for in a manual or electric knife sharpener.
    • First, the type of abrasive properties it has. Carbides can rough up the surface of your knifes and produce inconsistent results. Diamond, however, produces a strong, sharp blade. Sharpeners with diamond abrasive last longer and are of much higher quality.
    • Second is the type of sharpening chamber it has. Some create a better grip on the knife which allows for consistent contact with the blade. Wobbly chambers
  • Type of blades it sharpens: You’ll need to know your knives in order to determine the type of sharpener that’s best for you. Most techniques will easily sharpen straight-edge blades, but not all of them can handle angled knives, or 15-degree blades. Even less can handle serrated edges or ceramic knives. After you see this extensive lesson on how to sharpen a serrated knife, you’ll probably want to find an electric knife sharpener that can sharpen serrated knives for you!
  • Learning curve: With any new tool or appliance, there will be a learning curve. Whether it’s that you’ve never used that tool before, or that this particular model is more difficult than others you’ve used, those are all considerations to make when deciding on the right kitchen knife sharpener for you.
  • Cleaning requirements: Each method has specific cleaning requirements, and some can certainly be more tedious and time consuming than others.
  • Does it damage the blade: When I first started sharpening my knives, I worried a lot about damaging the blade. A good sharpener won’t damage the blade and I’ll go even further to say that it should guide well so that a user cannot cause damage inadvertently when using it. Many sharpeners come with different possible blade angles to produce the correct type of edge on different knife styles
  • Does it sharpen to your standards: Everyone has a different ideal for how sharp their knifes should be. I prefer to work with only the sharpest blades and I can easily tell when they are dulling. Some knife sharpeners achieve better results than others. If you want the sharpest blade, you’ll likely have to spend more to get it.
  • Space constraints: This is pretty self evident, but if you don’t have a lot of space in your kitchen for extra appliances, a small manual knife sharpener takes up much less space than an electric one does. Along the same lines, a professional electric sharpener will likely take up the most space.
  • Noise: There are a good many cheap knife sharpeners AND expensive ones that make a horrible amount of noise. The amount of noise they make doesn’t necessary relate to how well they’re sharpening, but it might sway you in another direction.

Types of Knife Sharpeners

Manual Knife Sharpeners

Manual sharpeners are generally very easy to learn how to use and they allow for a great degree of control when sharpening your knifes.   They also take up considerably less amount of space in your kitchen and don’t produce any loud, obnoxious noises.

To use a manual knife sharpener, you pull the blade of your knife through the slot provided and work the blade back and forth along the sharpening stone inside.

Manual sharpeners are generally quite a bit less expensive than electric sharpeners, they are lighter weight, smaller, and can be just as good at producing a sharp edge, when you apply the right pressure.

Electric Knife Sharpeners

An electric knife sharpener takes the manual labor out of sharpening a knife. Some people think they can cause damage to your knives, but if you choose the right electric knife sharpener, they can be a really great helper to many people who don’t want to learn how to use a stone, or just want to simplify the process.

Electric knife sharpeners are larger than manual ones and they require the use of electricity, so they aren’t as portable either. But they do the work for you, thus requiring less precision and input on your part.

Wet Stone knife sharpeners

Some kitchen gurus swear by water stones for sharpening, saying they deliver very high quality sharpness, but using them takes a lot of practice and patience, until you’ve mastered the skill.

I’ve never really gotten the hang of a wet stone sharpener, and I never really wanted to spend the time learning it properly. That makes me, and many other home cooks, not the perfect candidate for wet stone sharpening.

However, if you have the patience and are willing to develop the skill required, it can be very effective and it won’t require buying a really expensive electric machine that itself requires maintenance and could breakdown.

Sharpening and Honing Rods

We’ve included the honing rod in our reviews because it is an integral part of keeping your knives sharp and the edge straight to enable ease of use in the kitchen.

Honing your knives is different from sharpening them. A honing rod should be used in between sharpenings to keep the edge upright and cutting well. If you bought a knife set, it’s likely that it came with a steel honing rod. And it’s also likely that you have been under the impression that this tool is used for sharpening your knives, but it isn’t.

Rods are meant to correct the shape of the edge of the blade. Over time, the knife’s edge can roll over, causing it to cut as if the blade is no longer sharp. Rather than needing to be sharpened again, the knife just needs to be honed, to return the edge to its perfectly aligned position.

It is for this reason that a honing rod should be used on your knives more frequently than a sharpener.

Best Manual Knife Sharpener Reviews

Chefs Choice 4643 – Best Manual Knife Sharpener

Chef'sChoice 4643 Manual Knife Sharpeners 15 and 20-Degree for Serrated and Straight Knives Diamond Abrasives, 2-Stage, Gray
  • CHEF'SCHOICE - Professional 3-stage sharpener for super sharp edges on your 15 and 20-degree class knives
  • DIAMONDS - 100 percent diamond abrasives are used in all three stages. The initial stages sharpen and hone using 100 percent diamond abrasives while the third stage polishes the edge with micron sized diamond abrasives
  • KNIVES - Sharpen straight edge and serrated knives as well as sports and pockets knives
  • RAZOR SHARP - Chef’sChoice advanced CrissCross sharpening technology delivers an extremely sharp edge by using diamond abrasive wheels which sharpen simultaneously for a superior burr-free edge that cuts effortlessly
  • EASY TO USE - Precise bevel angle control creates ultra-sharp 15 and 20-degree edges

This manual knife sharpener is great for many different uses. Not only is it a fast way to sharpen your kitchen knives, it works for American, European and Japanese knives, as well as serrated knives and pocket knives.

It has a three-stage system with criss-cross technology and 100% diamond abrasive wheels for the strongest, most exact edge. The sharpener also has bevel angle control for 15 and 20 degree edges, so you can be sure you’re getting the tightest grip, thus the best edge.

Two of the three slots on the Chef’s Choice 4643 are for sharpening – one for 15-degree angle blades (Japanese knives), the other for 20-degree angles (European/American knives). The third slot is for use with serrated knives and for honing, so you don’t have to use a separate steel honing rod to perfect the blade.

There are other models of this sharpener available that will suit your needs better if you only have one type of knife to sharpen. For instance, if you’ll only be sharpening 20-degree angle knives, the Chef’s Choice 465 costs a bit less.

Overall, this Chef’s Choice knife sharpener is a great solution for kitchen knife sharpening. It’s light weight, easy to use, and offers the most features for the price. The sharpness you’ll achieve if you follow the Chef’s choices knife sharpener instructions is very good.

Without spending quite a bit more for an electric sharpener, this is surely one of the best manual knife sharpeners for 2017. Cook’s Illustrated agrees! Read our full review of this product.

  • Uses diamond abrasive wheels
  • Works on both 15- and 20-degree knives
  • Higher priced than competitors
  • Not as high end as other options

    Best Electric Knife Sharpener Reviews

    Presto Professional – Best Electric Knife Sharpener

    Presto 08810 Professional Electric Knife Sharpener, Multi/None
    • Easy 3-stage sharpening system for professional results at home, anytime.
    • Sharpens kitchen and sport knives, even Santoku knives.
    • Blade thickness selector adjusts guides to optimum sharpening angle.
    • Select thick for hunting knives, medium for chef's knives and standard kitchen knives, and thin for light blades like fillet and paring knives.
    • Blade guides hold knife at the perfect angle for no-guess sharpening.

    The Presto Proessional electric knife sharpener is a great option for getting professional results at home.

    The Presto has an extra-fine-grit ceramic wheel that produces a razer-sharp edge. It then has a second stage for honing. It is designed for use with kitchen and sport knives, even Santoku knives, of all thicknesses. You can adjust for the thickness of the knife to get the right sharpening angle

    With the Presto, there’s no guess work. The blade guides lead the knife through each stage to produce the right angle. It will only take a few passes through stage one to achieve a fairly good result, and you may even find that passing it through too many times or using too much pressure can result in a duller result.  

    After the final honing process, I’ve found that the blade is really sharp and easily can cut through paper or perform my usual tomato test. Done right, you can get an amazing edge with very few passes.

    If you’re looking for a high-quality product, the 08810 professional-grade sharpener is a great option that actually produces quality results. Watch Presto’s informational video about the 08800

    • Easy to use
    • Inexpensive
    • Ceramic abrasive
    • rather than diamond
    • Larger footprint than others

    Chef’s Choice 15 Trizor XV EdgeSelect Electric Knife Sharpener – Best for 15 degree edges

    Chef’sChoice Trizor 15XV Professional Electric Knife Sharpener for Kitchen Knives with Diamond Abrasives and Precision Angle Guides, 75db, 3 Slots, Gray
    • 3-Stage Kitchen Knife Sharpener: Stages 1 and 2 of the EdgeSelect knife sharpening system use 100% diamond abrasives to sharpen and hone edges; Stage 3 uses patented stropping disks to polish and finish the blade
    • Diamond Abrasives: This versatile straight-edge and serrated knife sharpener uses proprietary diamond abrasives, the hardest natural substance on earth, to quickly and easily sharpen edges; Operates at 65dB to 75dB
    • 15-Degree Edges: This electric sharpener applies an ultra-sharp edge to 15-degree knives and easily converts 20-degree knives to a finer 15-degree edge for easier cutting
    • Full Length Edge: Flexible spring guides hold the blade at the ideal angle during use, resulting in longer-lasting, arch-shaped edges down the full length of the blade
    • Easy To Use: Knife sharpener comes equipped with a simple on/off switch; First time sharpening requires approximately 1 minute; Resharpening takes approximately 10 seconds

    If you have a lot of high-quality kitchen knives and are looking to convert your 20’degree angled knives into 15-degree angles, the Chef’s Choice 15 Trizor XV is the electric knife sharpener for you.

    What sets this electric sharpener apart from others is its ability to convert typical 20-degree angled knives into 15-degree edges with precision. The Chef’s Choice 15 can accommodate almost any knife, including American, European and Japanese knives, with both single and double bevel, converting them all to 15-degree edges.

    It has advanced, patented flexible spring guides to control the sharpening angle, so you don’t have to worry about adjusting it yourself. It produces a burr-free triple-bevel fine edge with its 3-stage EdgeSelect process.

    The EdgeSelect system gives the user control over the type of edge they want to produce. By using stage 1 and 3, the blade will retain more “bite”, which is better suited for cutting through tougher things like thick-skinned produce. Using all 3 stages will result in a razor-sharp edge.

    The system can also accommodate serrated knives, small paring knives and pocket knives. If you like this knife sharpener for its ability to create and maintain 15-degree knives.

    • Uses only 100% diamond abrasive
    • Produces a very high-quality, sharp edge
    • Cannot be used to maintain a 20-degree edge
    • Carefully following instructions is necessary

    Chef’s Choice 1520 AngleSelect Diamond Hone Knife Sharpener – for more expensive knives, both 15 and 20-degree

    Chef'sChoice Hone Electric Knife Sharpener for 15 and 20-Degree Knives 100% Diamond Abrasive Stropping Precision Guides for Straight and Serrated Edges, 3-Stage, Gray
    • Electric 3-stage knife sharpener for straight, serrated, single-, and double-bevel knives
    • Puts a sharp edge on european/american (20 degree) and asian-style (15 degree) knives
    • Patented flexible stropping/polishing disks for a microscopically polished edge
    • 100-percent diamond abrasives sharpen and hone; knife guides
    • Measures 12 by 6-1/5 by 6-2/5 inches; 3-year limited warranty

    Because we know that not everyone wishes to re-edge their knives to a 15-degree angle, we’ve included the Chef’s choice 1520 AngleSelect as an alternative to the Chef’s Choice 15 Trizor XV.

    The 1520 was designed to sharpen Asian, European and American style knives to either a 15 or a 20 degree angle, depending on your preference. The 1520 uses all diamond abrasives to create an ultra-sharp edge on your knives.

    It also has patented, flexible stropping and polishing discs that put a “gothic arch” edge on your knives. Read more about the gothic arch edge. The 1520 can also be used to restore damaged blades and can recreate the 15 or 20-degree edge on any knife.

    Many different knives can be sharpened with this tool, including European/American blades, Japanese and Santuko blades, as well as sports, pocket and outdoor knives. Serrated knives are also supported on this electric knife sharpener.

    It’s a good choice for a high-end multi-purpose sharpener and is one of the top rated knife sharpeners for 2018. The Chef’s Choice 1520 comes in both white and black models. Read our full review of this product.

    • Uses only 100% diamond abrasive
    • Can be adjusted to work with 20 or 15-degree edges
    • Works on almost any knife
    • More expensive than other electric sharpeners
    • Difficult to use

    Best Sharpener Rod Reviews

    Messermeister 12″ Ceramic Rod / Sharpening Steel

    Messermeister 12” Ceramic Sharpening Rod - Knife Sharpener - Fine 1200 Grit - Ceramic Core, Large Sharpening Surface & Soft-Grip Handle
    • SHARPENING ROD - Messermeister provides a variety of must-have tools for maintaining, sharpening & honing the edge of your knife. We offer some of the world’s best sharpening steels, available from rough to ultra-fine grit.
    • SHARPEN WITH A PURPOSE - This knife sharpener has a fine 1200 grit, ideal for aligning & polishing knives, scissors & other cutting tools. It’s made with durable black ceramic, which is tougher than conventional white ceramic or steel.
    • HIGH QUALITY - Our knife sharpener features a break-resistant, solid ceramic core rod, a large round sharpening surface & an ergonomic handle with a hang ring.
    • OUR STORY - Founded in 1981, Messermeister is a leading manufacturer of premium handcrafted kitchen cutlery. Today, we’re a family and women-owned company, continuing to bring innovation & creativity to kitchens around the world.

    This Messermeister is made of ceramic which is very smooth. A ceramic rod should be used with most Asian knives that have more delicate blades and thinner edges. The ceramic rod provides a nice smooth finish on the knife’s knewly sharpened edge.

    Although this particular ceramic sharpener is a 12″ rod, other sizes (including a 8″ and a 10″) are also available. You should purchase a rod that is about the same length or slightly longer than the knives you’ll be using to sharpen it with.

    This Messermeister rod had an ergonomic grip and comes with a lifetime manufacturing warranty. Just be sure not to drop it, because the ceramic could shatter.

    Wüsthof – 10″ Knife Sharpening Steel

    WÜSTHOF 10" Sharpening Steel
    • 10-Inch sharpening steel

    Most of the sharpening rods that come with knife block sets are steel honing rods with grooves. In most cases, it is preferable to use a smoother steel rod, so it doesn’t scuff up the sharp edge too much.

    This Wüsthof sharpening steel is made from chromium plated steel with a hardness of 65° Rockwell has a fairly smooth surface so you don’t have to worry much about wearing down the blade. This 10″ steel rod is best used with knives that you’ll be using for tougher foods, like thick-skinned produce and meat, because of the micro-scuffing that will be added by the steel.

    It has a slip-resistant plastic handle and loop on the end so you can hang it on a hook in the kitchen.

    Best Sharpening Stone Reviews

    King Two-Sided Sharpening Stone with Base

    KING KW65 1000/6000 Grit Combination Whetstone with Plastic Base
    • King 01096 1000/6000 Grit Deluxe Combination Stone
    • King brand known for quality and affordability
    • Includes sturdy plastic base
    • 8" x 2 1/2" x 1" thick

    Assuming you’ve never used a whetstone to sharpen knives before, you should be aware that it takes practice and knowledge to get the right degree edge on the knife.

    We recommend watching a video on how to sharpen knives with a whetstone before deciding that this is the method for you. Here is an easy-to-follow video on YouTube that will show you the basics of how to use a wetstone, like the two-sided sharpening stone we recommend below.

    Our recommended sharpening stone is a two-sided whetstone from King. It is made in Japan and is a 1000 & 6000 grit combination stone. The 1000 grit side is used to sharpen and smooth the blade, while the 6000-grit side is used for honing the blade.

    These two grit levels are all you’ll need for sharpening basic kitchen knives. There are other grit levels that should be used for other types of knives, or for knives that are damaged and need restructuring. It comes with a plastic holder to keep the stone in place while sharpening.

    Knife Sharpening Frequently Asked Questions

    It’s always wise to know as much as possible before making a decision, and getting your questions answered is part of that equation. Below you will find a few of the top questions that are often asked about knife sharpeners.

    If you’d like to read more, check out our post with the top 10 knife sharpening questions.

    Question: Why do I need a knife sharpener?

    Answer: When you first buy a knife, it’s got a perfect angle and sharpness that makes cutting and chopping easy and safe. But over time the blade can begin to bend, chip and become dull.

    If you don’t regularly hone your knives after use, the edge will become very dull and will no longer cut easily through foods, as it once did. Keeping your knives sharp is important for a number of reasons, the most important of which are to make cutting as easy and fluid as possible, and to prevent accidents caused by dull blades.

    You can keep a knife in tip top shape for quite some time by regularly using a honing rod on it after every few uses. But eventually you will need to sharpen the knife again. You can have this professionally done, or you can do it yourself at home.

    Question: Are counter top knife sharpeners actually good for sharpening knives?

    Answer: There are many different types of knife sharpeners, both electric and manual, so it’s not easy to make a sweeping assumption about all counter top knife sharpeners.

    There are some that are better than others. Knife sharpeners that are made with the best quality products, and use diamond abrasives are the best and can sharpen your knives fairly well, without removing too much metal.

    On the other hand, lesser-quality sharpeners can cause significant damage to your knives, and many remove a lot of metal which can more quickly deteriorate the use of the knife.

    Would I use just any counter top sharpener on my most expensive knives? Absolutely not. But if you have a drawer full of basic kitchen knives, you can certainly sharpen them well with the right sharpener. These type of sharpeners can be a really great helper to many people how don’t want to learn how to use a stone, or just want to simplify the process.

    Question: Can a knife sharpener damage my knives?

    Answer: Yes, it is possible for a knife sharpener to damage your knives. This happens most frequently because the sharpener used was of low quality and the abrasives actually strip away too much metal, or are not aligned properly, thus making the edge even more dull in the process.

    User error is also to blame in many cases. If you are not sure how to operate the knife sharpener, you can damage the blade by running it through the abrasives too many times, with too much pressure, or at a slight angle. It is imperative to buy a high-quality knife sharpener and to fully understand how to use it before attempting to sharpen a knife.

    Question: How often do I need to sharpen my knives?

    Answer: Regular honing of your knives is the most important step in keeping your blades up to par. If you hone your knives after every heavy use, or every 2-3 regular uses, it will stay sharp for quite a while.

    If you are disciplined about this, you may not need to fully sharpen your knives very often, if ever. However, if your dedication falls slack, you may need to sharpen and polish your knife once every 6-8 months.

    If you never do any honing and are tough on your knives (drop them into the sink, put them in the dish washer, cut through things they shouldn’t be used for, etc) you may need to sharpen ever 3 months. This way of treating your knives will result in the shortest life-span for the knife.

    Question: Can a knife sharpener be used on ceramic knifes?

    Answer: Generally, the answer is no. While there are some knife sharpeners that do sharpen ceramic knives, the vast majority do not. You must be very careful to select the correct one.

    Question: Can a knife sharpener be used on all knives?

    Answer: Much like the previous answer, the type of knife you can sharpen with a specific sharpener varies greatly. You need to be aware of the types of knives that can be used with a specific sharpener.

    Some have slots for fishing and hunting knives, pocket knives, all types of kitchen knives, and even scissors. Some only allow for a specific type of metal and/or bevel angle.

    Question: How long does it take to sharpen a knife with a sharpener? How many times do I pull the knife through the slot?

    Answer: This answer varies based on how damaged the knife is. If you have a rather heavily damaged knife, you may need to pull it through the course slot 6-8 times, then through the fine slot another 6 times and finally through the polishing slot another 3 times.

    This will take about 8 minutes to complete. If the knife you’re sharpening is not damaged, just a bit dull, you’d only pull it through the fine slot 3-4 times, and through the polishing slot 3 times. You never want to apply heavy pressure when pull the knife through the slot.


    As you can see from this guide, there are many different choices you need to make when choosing the right knife sharpener for you. Hopefully this guide has helped you narrow down the choices.

    To recap, these are our favorite manual and electric knife sharpeners. If you still haven’t been able to make a decision, we can narrow it down to these two for you.

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    18 thoughts on “How to Find the Best Knife Sharpener

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    4. Terry says:

      Quite a good review. I find the best and easy conclusive sharpness test is ” will it shave”… simple as that. You can easily cut a tomato with a reasonable amount of sharpness, but shaving, splits the men from the boys.

    5. Steve says:

      I tried to sharpen a dull knife with the Trizor XV and passed it 20 times thru first slot and the nice still didn’t slice thru paper. Should I throw out the knife?

      • Laura says:

        Steve, sometimes knives become too dull to be sharpened this way. You don’t necessarily have to throw it out, but you would probably want to get it professionally sharpened and then keep up on the maintenance yourself afterward with the Trizor.

    6. Gail Bederman says:

      Hi. Very helpful, except according to the manufacturer, the Presto 8800 does NOT sharpen serrated knives. You need to upgrade to the 8810 for serrated knives, if you go with Presto.

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