The Work Sharp Rolling Knife Sharpener is a handheld manual sharpener that uses a Magnetic Angle Block and Rotating Abrasives to quickly and easily sharpen your knives. The Magnetic Angle Block has four different sharpening angles (15°, 17°,20°, 25°) to sharpen a wide variety of knives from Folders, Pocket Knives, and Kitchen knives to the optimum angle. The three abrasives - coarse 320 Grit diamond, fine 600 Grit diamond, and fine ceramic hone will restore your knives back to a razor-sharp edge. Place your knife against the Magnetic Angle Block on one of the pre-set angles. Starting with the Coarse Abrasive, roll the abrasive along the cutting edge then quickly change to the finer abrasives to complete the process. It's that easy. Compact size easily fits into a kitchen drawer. Never struggle with a dull knife again. Sharpen with Work Sharp. Work Sharp is a 4th generation family-owned business in Southern Oregon that is dedicated to designing and manufacturing the finest in sharping tools. Customer-centered designs are the core of our design philosophy and our products are backed by a 3-year warranty.