Work Sharp WSSAKO81115 Blade Grinder Attachment Replacement Belt Kit Belts are 1" x 18" and ONLY fit the Ken Onion Edition Blade Grinder Attachment and WS3000 Belt Sharpening System Attachment These premium grade, engineered abrasives are long lasting and designed for knife & tool grinding, sharpening and honing applications Not for use on the WSKTS or base model WSKTS-KO