There is a specific kind of frustration in pulling a knife out of the block, pressing it against a tomato, and watching the skin refuse to break. The blade is not ruined, it just needs a fresh edge, and the shelf of sharpeners promising exactly that edge is where the confusion starts. Half of them call themselves 20 degree sharpeners when the angle is locked into a plastic slot, others when it is one setting among six, and a few when an electric stage grinds whatever you feed it to a fixed bevel. The number on the label says nothing about which of those you are buying.
I went through the listings for the best 20 degree knife sharpeners and compared what each tool actually controls: the abrasive it uses, whether the angle is fixed or selectable, how the blade is held steady during a stroke, and how much of the work the device does for you. Sharpening is a subtraction job, so the tool that removes the least steel while still restoring the bevel is usually the one worth keeping on the counter. The BHK Score used across this site weighs those details, along with build materials and how easily each sharpener lives in a normal kitchen drawer. Marketing lines about diamond abrasives were set aside unless the listing also stated the grit, the stage count, or the angle supports.
My overall pick for best 20 degree knife sharpeners is the AIERLIAN Knife Sharpener Tool. A magnetic support holds the blade at either 15 or 20 degrees while a rolling diamond disc removes the worn bevel and a ceramic disc polishes behind it, so one base covers both a heavy European chef’s knife and a thinner Japanese blade. My top picks are just below.
Our Top Picks
| Product | BHK Score | ||
|---|---|---|---|
| Best Overall AIERLIAN Knife Sharpener Tool with Multi-Angle | 9.9 | Check Price on Amazon | |
| Best for Precise Sharpening Chef'sChoice 15XV EdgeSelect Electric Sharpener | 9.9 | Check Price on Amazon | |
| Best for 15-Degree Knives ACCUSHARP Gourmet Series 15º Knife Sharpener | 9.7 | Check Price on Amazon | |
| Best for Manual Sharpening Chef'sChoice Manual Knife Sharpener with Diamond | 9.7 | Check Price on Amazon | |
| EdgeCraft Manual Knife Sharpener with Diamond | 9.6 | Check Price on Amazon | |
| Best for Versatile Sharpening ZCircle 4-Stage Knife Sharpener with 6 Adjustable | 9.5 | Check Price on Amazon | |
| Chef'sChoice Electric Knife Sharpener with Diamond | 9.5 | Check Price on Amazon | |
| Chef's Choice Electric Knife Sharpener | 9.5 | Check Price on Amazon | |
Full Reviews
AIERLIAN Knife Sharpener uses diamond and ceramic discs with magnetic angle guides for consistent sharpening at 15 or 20 degrees.
Key Facts
- Dimensions
- 5.49 x 4.6 x 2.7 Inches
- Weight
- 1.26 Pounds
- Material
- Natural Wood with Diamond and Ceramic Discs
- Included
- Leather Strop
Pros
- +Dual abrasive discs for initial sharpening and finishing polish
- +Magnetic support holds knives firmly during sharpening
- +Leather strop included for edge refinement
Cons
- −Not suitable for serrated blades or scissors
- −Relatively small size may limit handling of larger knives
- −Requires separate manual cleaning, no dishwasher-safe parts
Detailed Review
This AIERLIAN knife sharpener features #400 diamond and #3000 ceramic discs that handle both coarse sharpening and fine polishing. The combination targets different sharpening stages to restore and refine blade edges. It also includes two magnetic angle supports at 15 and 20 degrees to keep a consistent sharpening angle, which is important for achieving a clean edge and is adjustable for different knife types.
I see this sharpener working best for those who want a controlled sharpening process with a smaller countertop footprint. The natural wood body and magnetic base provide a stable sharpening surface, but the tool is not designed for serrated knives or scissors, which limits its versatility. The included leather strop offers an additional step for edge finishing after sharpening.
Worth knowing before you buy is that its size might not accommodate very large knives comfortably. For my money, this suits home cooks who want a precise sharpening aid with a compact design and prefer a manual approach with clear angle guidance.
Electric knife sharpener with 100-percent diamond abrasives and three-stage sharpening system for straight and serrated blades.
Key Facts
- Size
- 3-stage
- Dimensions
- 10 x 4.25 x 4.25 inches
- Material
- 100-percent diamond abrasives
- Weight
- 4.189 pounds
Pros
- +100-percent diamond abrasives for effective sharpening
- +Automatic angle adjustment with patented spring guides
- +Sharpens both straight edge and serrated knives
- +Approximate 1-minute first-time sharpening duration
Cons
- −Relatively heavy at over 4 pounds limits portability
- −No dishwasher-safe claim requires manual cleaning
- −Single color option limits aesthetic choices
Detailed Review
The Chef'sChoice 15XV EdgeSelect is an electric sharpener featuring a three-stage system that uses 100-percent diamond abrasives to sharpen and hone both straight and serrated knives. Its patented flexible spring guides help maintain a precise 15-degree angle, converting typical 20-degree factory edges into a sharper Trizor XV edge.
I see this working best for cooks who want a compact device with a manageable 10 by 4.25-inch footprint that fits on most counters without crowding. The advanced stropping stage helps prolong serrated blade life, which is useful for serrated knife owners.
Worth knowing before you buy is its weight of over 4 pounds, which reduces portability, and it lacks dishwasher-safe parts, so cleaning requires care. For my money, this suits home cooks focused on maintaining sharp knives with consistent angles and a modest counter presence.
The ACCUSHARP Gourmet Series sharpener features reversible diamond-honed tungsten carbide blades designed for 15-degree gourmet knives.
Key Facts
- Size
- 2.38 x 0.75 x 5.5 inches
- Material
- Diamond-honed tungsten carbide blades
- Color
- Black
Pros
- +Diamond-honed tungsten carbide blades for effective sharpening
- +Ergonomic handle provides secure grip and comfort
- +Reversible blades extend usable life
- +Lightweight and easy to handle
Cons
- −Limited to knives with 15-degree edge angle
- −No dishwasher-safe claim requires hand washing
- −No storage sheath or protective cover included
Detailed Review
This ACCUSHARP Gourmet Series sharpener uses reversible diamond-honed tungsten carbide blades which enhance its lifespan by allowing both sides to be used. It is specifically designed for sharpening gourmet knives with a 15-degree edge, covering both straight and serrated blades. The sharpener's ergonomic handle with a full-length finger guard aims to provide safety and comfort during use, which suits both home and industrial kitchens.
I see this product working best for someone who regularly maintains gourmet knives with a specific 15-degree edge angle and values a compact, hand-held sharpener. Worth knowing before you buy is that it does not come with a protective cover, so storage requires care to keep the blades safe. The sharpener is lightweight, which adds to its ease of use but also means it lacks a heavy base for hands-free sharpening.
For my money, this suits kitchens where space is limited and occasional precision sharpening is needed rather than heavy daily use. The narrow footprint means it stores easily, but users must follow manual instructions for safe handling.
Manual knife sharpener using 100 percent diamond abrasives for precise 15 and 20-degree edges on straight and serrated knives.
Key Facts
- Size
- 9.25 x 2 x 2 inches
- Weight
- 0.5 Pounds
- Material
- 100 percent Diamond Abrasives
- Stages
- 2-Stage
Pros
- +Diamond abrasive wheels sharpen and polish simultaneously
- +Precise angle control for 15 and 20-degree blade edges
- +Lightweight design at 0.5 pounds for easy handling
- +Compact size suitable for limited countertop space
Cons
- −Limited to 15 and 20-degree angles only
- −No electric or motorized sharpening stage included
- −Gray color offers few aesthetic options
Detailed Review
This Chef'sChoice manual sharpener uses 100 percent diamond abrasives across its two-stage process to sharpen and polish knives precisely at 15 and 20-degree angles. It supports both straight edge and serrated knives along with sports and pocket knives, offering versatility for various blade types. The compact footprint of 9.25 by 2 by 2 inches makes it practical for kitchens with limited counter space. I see this working best for cooks who want control over sharpening angles without an electric sharpener.
Its lightweight, at half a pound, and the soft touch handle provide comfortable, secure grip during use. Worth knowing before you buy is the absence of electric or motorized assistance, meaning sharpening requires manual effort. The gray color is functional but doesn’t offer style variety. I rate this a reasonable pick for home cooks needing precise manual sharpening in a compact form.
Manual knife sharpener using diamond abrasives with 15 and 20-degree angle sharpening for serrated and straight knives.
Key Facts
- Size
- 9.13 x 2.13 x 2.75 Inches
- Material
- Diamond Abrasives
- Included Stages
- 2-Stage
- Color
- Gray
Pros
- +Precision angle control for consistent sharpening results
- +Wide sharpening slots accommodate multiple knife styles
- +Lightweight design at 0.49 pounds for easy handling
Cons
- −Limited to manual operation without electric assistance
- −No dishwasher-safe claim requires hand cleaning
- −Only available in one color option, gray
Detailed Review
This sharpener uses diamond abrasives, which are among the hardest natural materials, enabling quicker edge sharpening. It offers two distinct angles, 15 and 20 degrees, accommodating both finer and traditional knife edges, which is useful for precision slicing and general sharpening needs. The design includes wide sharpening slots that fit a variety of knives including serrated and outdoor types.
Worth knowing before you buy is the manual operation, requiring consistent hand motion without electric assistance. I see this working best for users comfortable with manual sharpening who appreciate angle precision and versatility. The compact footprint under 10 inches long suits kitchens where counter space is limited.
For my money, this sharpener suits households with diverse knife collections needing regular edge maintenance without relying on power tools.
This ZCircle knife sharpener offers 4 stages with tungsten steel, diamond sand, and ceramic rods for versatile edge restoration and polishing.
Key Facts
- Dimensions
- 11 x 1.38 x 2.76 inches
- Material
- Tungsten steel, diamond sand, ceramic rod, ABS housing
- Included
- 4 sharpening stages, scissors grinding slot
Pros
- +Adjustable sharpening slots cover a wide range of blade angles
- +Ergonomic widened handle for secure grip and control
- +Durable ABS housing with scratch-resistant finish
- +V-groove design aligns blades naturally for consistent sharpening
Cons
- −Limited to manual pull-through sharpening method
- −No electric or motorized option for automated sharpening
- −Only one color option available (black)
Detailed Review
This ZCircle sharpener features four distinct sharpening stages including tungsten steel for edge restoration, diamond sand for burr removal, and a ceramic rod for polishing. It also offers six adjustable angles ranging from 10° to 35°, which covers most kitchen knives and scissors. The anti-slip TPE base enhances safety by keeping the sharpener stable during use, paired with an ergonomic widened handle for a secure grip and better distance control.
Worth knowing before you buy is that this model relies on manual pull-through sharpening and does not include any electric assistance, which may affect ease of use for some. I see this working best for home cooks who prefer a compact, versatile sharpener that accommodates various blade types. For my money, this suits kitchens where space is limited and multiple knife angles are needed.
Electric knife sharpener with 3 stages and diamond abrasives for 15- and 20-degree edges.
Key Facts
- Size
- 12 x 3.37 x 6.25 Inches
- Weight
- 4.9 pounds
Pros
- +Electric operation simplifies sharpening process
- +Supports multiple blade bevels including serrated edges
- +Includes patented flexible stropping disks for polish
Cons
- −Relatively heavy weight at nearly 5 pounds
- −Footprint may be bulky for very small countertops
Detailed Review
This Chef'sChoice knife sharpener features diamond abrasives and a 3-stage process designed specifically for both 15- and 20-degree edges, covering common European, American, and Asian knives. The inclusion of patented flexible stropping disks is a notable detail that allows for a microscopically polished edge beyond basic sharpening. The unit measures just over 12 inches long with a mid-sized footprint, which could suit most kitchen counters but might feel bulky in very tight spaces. I see this model working best for home cooks needing versatile sharpening for a variety of straight and serrated knives. Worth knowing before you buy is its weight, close to 5 pounds, which affects portability and storage. Overall, I rate this a reasonable pick for users wanting precision angle control without manual effort.
Electric knife sharpener with 3-stage diamond abrasives and precision angle control for 15- and 20-degree edges on straight and serrated knives.
Key Facts
- Size
- 3.94 x 1.67 x 1.67 inches
- Weight
- 4.15 Pounds
Pros
- +Diamond abrasives provide effective sharpening and honing
- +Precision angle control ensures accurate edge alignment
- +Sharpening capability extends to serrated and straight knives
Cons
- −Relatively heavy weight at 4.15 pounds limits portability
- −Limited color option available only in white
- −No dishwasher-safe or easy-clean feature specified
Detailed Review
This Chef's Choice electric sharpener delivers 3-stage sharpening using 100% diamond abrasives for restoring and honing edges. It offers two angle settings, 15 and 20 degrees, allowing users to choose a finer or traditional edge depending on the knife and cutting preference. The precision angle guides help maintain consistent sharpening along the entire blade, which removes uncertainty common with manual sharpeners.
The unit accommodates both straight-edge and serrated knives, adding versatility for different kitchen tools. Its compact size keeps the countertop footprint manageable, but at 4.15 pounds, it is somewhat heavy to move frequently. I see this working best for home cooks who want controlled, repeatable sharpening without manual guesswork.
Worth knowing before you buy, it comes only in white and lacks any dishwasher-safe parts, so cleaning requires manual care. For my money, this suits kitchens where space is limited but precise angle control is prioritized.
FAQs
What is the difference between a 15 degree and a 20 degree knife edge?
The 20 degree edge leaves more steel behind the bevel, which stands up to chopping, while a 15 degree edge slices with less resistance. Most European and American kitchen knives ship at 20 degrees, so that setting covers the bulk of household blades. Thinner blades need more frequent touch-ups.
Can you sharpen a serrated knife on a 20 degree sharpener?
Serrated knives need work on the flat side of each scallop, and only sharpeners with a dedicated serrated stage or a flexible abrasive stage handle that without rounding the teeth. A plain V-slot will flatten the points over time. Follow the manufacturer’s instructions for your blade before running it through.
Is an electric knife sharpener better than a manual one?
An electric sharpener holds the angle through each pass, so a household with several knives gets through the whole block in a few minutes. Manual models cost less and store in a drawer, but a loose stroke in the slot produces an uneven bevel. A manual sharpener with fixed slots is easier to learn than a whetstone set, which asks for a steady freehand angle.
How often should a kitchen knife go through a 20 degree sharpener?
Sharpening removes metal, so a few light passes every couple of months keeps a 20 degree edge usable, with steeling or stropping in between. Knives that meet hard produce and bone daily will need attention sooner. Follow the pass counts in the manufacturer’s manual rather than grinding the blade every week.
Final Thoughts
What separates a useful sharpener from a drawer ornament is not the angle printed on the box but whether that angle gets held on every pass. A guided slot, a magnetic arm, and an electric stage can each produce a 20 degree bevel, yet the abrasive grit, the steadiness of the guide, and how much of the motion the tool controls decide whether the next tomato slices cleanly or the blade slowly gets chewed up. The BHK Score ranks on that balance rather than on price alone.
For most kitchens, the AIERLIAN Knife Sharpener Tool is the one I would start with. Having 15 and 20 degree supports on the same base means you are not buying a sharpener for one style of knife, which matters in households that mix a German-style chef’s knife with a thinner santoku. The diamond disc does the reshaping, the ceramic disc and the included leather strop finish the edge, and the kit stores in its own box instead of taking over a counter. It suits cooks who want repeatable results without learning a freehand stroke, and the trade-off is that a rolling system asks for a little patience on the first few knives.
If budget is the deciding factor, the 6-Angle Adjustable Professional 4-Stage Knife does the most for the least. Six settings from 10 to 35 degrees plus a dedicated scissors slot cover cleavers, paring knives and kitchen shears, and the tungsten steel, diamond and ceramic stages follow the coarse-to-fine sequence a dull edge actually needs. The ABS body and the plastic feel of the guides are where the savings show, so it fits a first apartment or a drawer of inexpensive knives better than a collection you plan to keep for years.
The right sharpener settles one nagging question for good: whether the edge you are cutting with is the angle you thought you had.