Leecraft model CR-4 fits Sears Craftsman 21833 (351.218330), Grizzly G0715P, Dayton 4KXD1, Masterforce 240-0036. LEECRAFT Phenolic Inserts and Sheet Stock reduce splintering and chip-out on the bottom side of regular or dado table saw cuts. Simply raise your saw blade through the insert to create a "kerf" which precisely matches the blade on your saw. Complete with instructions. Insert surface colors may vary.