The EdgeTek Ultra Steel 10" sharpener offers an easy carry sharpener with a 100% diamond coated three-sided surface and oval contour for sharpening a wide variety of blade edges. Lightweight. Perfect for storage in a kitchen drawer or toolbox. Easy to carry. It is designed to handle a variety of blade geometries to cover just about any blade. Tri-Grit: 325 Coarse, 750 Medium and 1200 Fine.