Compare Knife Sharpeners
Work Sharp Precision Adjust Elite Knife Sharpener scores higher on safety - here's why.
R3 scored the Work Sharp Precision Adjust Elite Knife Sharpener 9.4/10 and the Kerye Professional Japanese Whetstone Knife Sharpener Kit (400/1000 3000/8000 Grit) 8.0/10 on the same knife sharpeners scoring system, weighing safety, efficacy, and usability. The Work Sharp Precision Adjust Elite Knife Sharpener comes out ahead, led by its safety score (9.4/10 vs 7.4/10).
The most important dimensions, side by side.
See which one actually scores higher — and why
Free account unlocks full safety scores, spec-by-spec breakdown, and the R3 verdict on Work Sharp Precision Adjust Elite Knife Sharpener vs Kerye Professional Japanese Whetstone Knife Sharpener Kit (400/1000 3000/8000 Grit).
Unlock the full Work Sharp Precision Adjust Elite Knife Sharpener vs Kerye Professional Japanese Whetstone Knife Sharpener Kit (400/1000 3000/8000 Grit) breakdown
Free account unlocks all safety scores, complete spec comparison, scoring rationale, and the R3 verdict on which one to buy.
Everything you need to make the call - who each one is for, and who should skip it.
Go for it if you...
You own both Japanese (15°) and Western (20°) knives
You want professional-grade edge progression across 7 grit stages
Blade longevity matters more than sharpening speed
You're willing to invest 1–2 hours learning proper whetstone technique
Edge quality is the priority and you have 10–15 minutes per knife
You enjoy the meditative process of traditional knife sharpening
The main thing to know
Takes 5–10 minutes per knife vs. 2 minutes for a quality electric sharpener.
Results are technique-dependent — a beginner may produce worse edges than an electric sharpener until they practice.
Skip this if you...
You want a plug-and-play electric option
You only own Western 20° knives and sharpening speed matters
You want plug-and-play results with zero learning curve
You need to sharpen serrated knives
Neither of these quite what you're looking for?
I've reviewed all Knife Sharpeners options at every price pointEvery Knife Sharpeners in our database is scored using R3's deterministic scoring system - the same inputs always produce the same score. For this comparison, we evaluated Work Sharp and Kerye across 3 independent criteria: Safety (67%), Efficacy (27%), Usability (6%). No sponsored rankings. No paid placements.
Straight answers - no sponsored content, no filler.
I'd start with Work Sharp Work Sharp Precision Adjust Elite Knife Sharpener - it scored 9.4/10 overall in our scoring system. Safety is our top-weighted scoring pillar, followed by efficacy, and usability. Check which pillar matters most to your family and compare those specific scores.
R3 uses a deterministic scoring system - the same inputs always produce the same score. We evaluate each Knife Sharpeners across Safety, Efficacy, Usability using independently verified data. No sponsored rankings. No paid placements. Every score is fully reproducible.
Not necessarily. The overall score reflects how we weight those three pillars, but your priorities may differ. If you care most about safety, compare the safety scores directly. If budget drives your decision, the prices tell a clearer story. The "right" pick is the one that matches what matters most to your family.
Not the right match? Explore these alternatives in the same category.
