In-depth review
Work Sharp Ken Onion Mk.2 Review (2026)
In-depth review of the Work Sharp Ken Onion Mk.2: belt sharpening, adjustable guides, and whether it is too much machine for a kitchen.
Work Sharp Ken Onion Edition Mk.2 Knife and Tool Sharpener
The do-everything belt machine: flexible abrasive belts, adjustable guides, and speed control for kitchen knives, scissors, and workshop tools alike.
Our verdict
The Work Sharp Ken Onion Mk.2 is the best sharpener for owners who sharpen everything, because flexible belts and adjustable guides handle a range of blades that slot machines cannot. Kitchen knives, pocket knives, scissors, serrated blades, and garden tools all pass through the same machine, with speed control that lets you hone slowly or reshape quickly. It is more machine than a kitchen-only cook needs, and it removes steel fast enough to demand respect, but for a household with a drawer full of different blades, nothing else here is as versatile.
What we like
- Flexible abrasive belts follow the blade and produce a keen, consistent edge quickly, even on knives that a slot sharpener struggles with.
- Adjustable sharpening guides cover bevels from 15 to 30 degrees, so one machine suits delicate kitchen edges and sturdier tool edges.
- Variable speed with an LED display lets you grind slowly for honing and faster for reshaping, instead of one speed for every job.
What to watch out for
- A belt machine removes steel fast, so a heavy hand or a long pass can round a tip or overheat a thin edge.
- Belts are consumables, so long-term cost includes replacements, unlike a stone or diamond wheel system.
- It is a workshop-flavoured machine in size and noise, less at home on a small kitchen counter than a compact Chef'sChoice.
Who it is for
Owners who sharpen kitchen knives plus pocket knives, scissors, and tools, and who want one machine for all of them.
Belts change what a sharpener can do
A slot sharpener has a fixed abrasive in a fixed shape, which is why it suits one blade type well and others poorly. A belt flexes around the edge, follows curves, and handles serrations, scissors, and tool edges that a slot would chew up. That flexibility is the Ken Onion's whole argument: one machine, many blades, with the belt doing the adapting instead of the user buying a different tool for each blade.
Guides and speed keep it controlled
Adjustable guides from 15 to 30 degrees set the bevel, and seven speeds with an LED display set the pace. Slow speeds suit honing a kitchen knife you care about, while faster speeds suit reshaping a mower blade or a dull axe. The combination means the machine is not just powerful but adjustable, which matters because the same power that restores a tool quickly can round a delicate tip if used carelessly.
How it stacks up
Against the Chef'sChoice 15XV, the Ken Onion wins on versatility and tool sharpening, while the 15XV wins on kitchen simplicity and quiet operation. Against the Work Sharp Precision Adjust, the Ken Onion wins on speed and range, while the Precision Adjust wins on exact, repeatable angles for a single prized blade. Against the Presto EverSharp, the Ken Onion wins on everything except outlay and counter simplicity.
What owners report
Commonly praised
- One machine handles kitchen knives, scissors, and garden tools without buying separate gadgets
- Belt changes are quick, and the speed control makes delicate work feel controlled
- Blades that other sharpeners struggled with come back sharp in short order
Common complaints
- Belts wear out and need replacing, which adds an ongoing cost
- The machine is louder and bulkier than a quiet kitchen slot sharpener
- Beginners can round a tip if they rush a pass at high speed
Recurring themes from owner reviews on retailers and forums, summarised by our editors. Updated October 2026.
Key specifications
- Sharpening method
- Flexible abrasive belts
- Angle guides
- Adjustable, 15 to 30 degrees
- Speed control
- 7 speeds with LED display
- Sharpens
- Kitchen knives, pocket knives, scissors, serrated blades, and tools
- Includes
- Replacement belts
Also consider
Chef'sChoice 15XV EdgeSelect Professional Electric Knife Sharpener
The kitchen electric to beat: a dedicated 15 degree edge, diamond abrasives, and three stages that take a knife from dull to polished without guesswork.
- Stages: 3 stages
- Edge angle: 15 degrees
Work Sharp Precision Adjust Knife Sharpener Kit
The guided system for people who want to learn sharpening properly: a clamped blade, a fixed angle, and stones that progress from coarse to fine.
- System: Clamp with angle-adjustable sharpening rod
- Angle range: 15 to 30 degrees
Research-based assessment. ThePickLedger has not hands-on tested this product; this evaluation synthesizes manufacturer specifications, retailer documentation, and published expert reviews.
Questions, answered
Is a belt sharpener too aggressive for kitchen knives?
It can be, if used at high speed with heavy pressure, but at slow speed with a light touch it produces a keen kitchen edge quickly. The key is to let the belt do the work, keep passes short and even, and finish with a fine belt rather than grinding on a coarse one.
What do replacement belts cost over time?
Belts are consumables, so owners should expect to replace them as they wear, with frequency depending on how much sharpening you do. Home kitchen use wears belts slowly, while workshop use wears them faster, and the Mk.2 listing includes replacement belts to start.
Can the Ken Onion sharpen scissors and serrated knives?
Yes, the maker lists scissors and serrated blades among the supported types, alongside kitchen and pocket knives and tools. Serrated blades need a light touch and the right guide setting, since grinding the serrated side flat would destroy the serrations.