This is a double-sided hardened die is for the LASSCO WIZER corner cutter model CR-177. One side of the die accepts a 1/4 inch radius blade: the alternate side accepts a 3/8 inch radius blade. For the mating blades, search on CR177-14 or CR177-38 respectively. Or, you may call us for clarification and to place your order. (Old P/N WZ177C)