Work Sharp Combo Knife Replacement Belt Kit - Replacement Belt Kit for the Work Sharp Combo Knife Sharpener. Contains three P120 abrasive belts by 3M These long lasting, cool cutting engineered abrasive belts are a direct replacement for the Work Sharp Combo Knife Sharpener. Belt size is 0.5in x 10inch and do not fit other Work Sharp products. Belt size is 0.5in x 10 inch Kit includes 3 belts