Leecraft model SC-1 fits Steel City 10" Riving Knife Cabinet Saw Model #35900 Series, RIDGID R4511, Sears Craftsman 351.221160. 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.