Hougen 75490 Round Punch 9/16-Inch is a part for the 75004A Ogura Hole Puncher. The nominal size of the round punch is 9/16-inch. The actual size of the hole is .551-inch. This round punch can be used with Die 9/16R, part number 75509, for Flat Bar, Angle and H-Steel material that is 5/64 to 1/8-inch thick, or 14 to 11 gauge. This round punch can be used with Die 9/16S, part number 75510, for Flat Bar, Angle and H-Steel material that is 1/8 to 1/4-inch thick, or 10 to 3 gauge. This round punch can be used with Die 9/16T, part number 75511, for Flat bar, Angle and H-Steel material that is 1/4 to 3/8-inch thick. This round punch can also be used with Die 9/16C, part number 75527, for Channel steel that is maximum 5/16-inch thick. The 75004A is still portable yet its 22 ton punching pressure and double insulated motor move it up to punching 3/8-inch materials. Easily confirm the hole position with the jog down feature. Punch automatically returns to the starting position after the punching cycle is complete.