Abrasive belts are formulated, designed, and made for precision sharpening of high-strength steels. The grit symmetry, spacing, and backing flexibility are all designed to produce the optimal convex edge with minimal heating or material takeoff. If youve ever used a belt sander to sharpen, you know hot quickly the steel heats and how much excess material can be removed if you arent careful. Our abrasives are a key component of our success in the sharpening world.In The Box:(1) Red P120 Belt, 3/4″ x 12″(1) Grey X65 Belt, 3/4″ x 12″(1) Grey X22 Belt , 3/4″ x 12″(1) White X4 Belt, 3/4″ x 12″(1) Purple 6000 Belt , 1/2″ x 12″