It's never been easier to put a razor-sharp edge on a knife. Just three or four strokes with the Edge-1 Knife Sharpener will restore any blade. The secret is a precision V-shaped tungsten carbide sharpening element in the head of the sharpener. Designed with and ergonomic grip, finger guard and thumb rest, the Edge-1 knife Sharpener is both safe and comfortable to use right-handed or left-handed.