Work Sharp Benchtop Bench Stone is a 3-sided, angled abrasive sharpening system. The medium (320) and fine (600) grit diamond inserts quickly smooth the edge, while the fine grit ceramic stone creates an incredibly sharp 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. The sharpening guides are interchangeable at 20° or 25°. The Pivot Response feature can be locked to provide a rigid sharpening surface for a wide range of knife and tool sharpening applications.