The Work Sharp Benchtop Bench Stone is an Angle Guided, 3-sided abrasive sharpening system. Medium and Fine Grit Diamond Plates quickly restore a sharp edge, while the Fine Grit Ceramic Stone creates an incredibly keen edge on any knife. The innovative Pivot Response 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. Pivot Response feature can be locked out to provide a rigid sharpening surface for a wide range of knife & tool sharpening applications.