Work Sharp Ken Onion Knife Sharpener System

The Work Sharp Ken Onion Edition Knife & Tool Sharpener is widely considered the "gold standard" for powered home sharpening. Developed in collaboration with legendary knife maker Ken Onion, this system uses flexible abrasive belt technology—the same method used by professional blade smiths—to create a superior convex edge. Unlike flat grinds, a convex edge puts more steel behind the cutting point, resulting in a blade that stays sharper for longer and cuts with less friction.

This edition is a significant step up from the standard Work Sharp model, offering a variable speed motor and a fully adjustable sharpening guide. You can dial in any angle from 15° to 30° in 1° increments, giving you the precision to sharpen everything from a delicate 15° Japanese chef’s knife to a rugged 25° outdoor cleaver. The kit includes five different grit belts, ranging from P120 extra-coarse for repairing damaged blades to a 6000 extra-fine micro-mesh for a mirror-polished finish.