The Darex Work Sharp Knife and Tool Sharpener - Ken Onion Edition is designed to sharpen any knife by using a precision sharpening guide and variable speed, flexible abrasive belts. The sharpening guide is adjustable from 15 degrees to 30 degrees in one-degree increments. It also sharpens scissors and performs light duty tool sharpening tasks. This tool has a one-year warranty and includes a complete abrasive belt set, detailed user's guide and instructional DVD.