The Work Sharp® Benchstone Knife Sharpener™ is an Angle Guided, 3-sided abrasive sharpening system. Medium (320) Grit Diamond and Fine (600) Grit Diamond Plates quickly restore a sharp edge, while the Fine Grit Ceramic Stone creates an incredibly keen edge on any knife. Abrasives are user replaceable. The innovative Pivot-Respons® system allows the abrasive to follow the curve of the blade – making manual sharpening faster, easier and more precise than ever. Sharpening Guides are interchangeable from 20° or 25°and optional to use, additional 15° and 17° Sharpening Guides Sold Separately. Sharpens pocket and outdoor knives of all types and can also be used on kitchen knives. Pivot-Response® feature can be locked out to provide a rigid sharpening surface for a wide range of knife & tool sharpening applications. Anti-skid feet ensure a safe and stable process. No water or oil is required, making sharpening faster with less set up and clean up. Abrasives are user replaceable to provide service ability over the life of the sharpener. Professional level bench-top knife sharpening made easy.