This SPD series punch and die set has a ¾-inch standard bolt, 0.81-inch hole, 0.50-inch cold rolled C-1018, and 0.50-inch boilerplate. The circle hole punch and die set is suitable for use with SP35, SP35S, SP35SP, MSP351, MSP351PE, STP35H, and STP35A hydraulic punches. It has a 0.31-inch stainless 302 annealed/stainless.