REPLACEMENT BELT P220 (WHITE) **KEN ONION EDITION** Belt Size: 1 x 18 Coarse grit belt for the WSKTS-KO Blade Grinding Attachment. Intended for sharpening knives. X22 is equivalent to P1000. Belts are 1 x 18 and only fit the Work Sharp Knife & Tool Sharpener | Ken Onion Edition Blade Grinding Attachment and the Work Sharp WS3000 Belt Sharpening System.