Work Sharp WSSA0002012 Knife & Tool Sharpener Replacement Belt Kit (WSKTS & WSKTS-KT) Assorted replacement belt kit includes (2) P80 coarse, (2) P220 medium, and (2) 6000 fine. These abrasive belts are direct replacements for the abrasive belts that comes standard with the WSKTS & WSKTS-KT Premium grade, long lasting abrasive belts. Specific selection for optimum sharpening performance Manufactured by leading brands in belt technology: Norton (P80 & P220) and Micro-Mesh (6000) Abrasives: aluminum oxide (P80); ceramic oxide (P220); silicon carbide (6000) - Backing: waterproof polyester (P80, P220); flexible cotton backing with polymer emulsion cushioning layer (6000)