Round standard metal punch units are complete units consisting of punch, die and draw stud. 1-7/32" (1.21 mm) actual hole size. Use with battery-powered, hydraulic, ratchet or manual drivers. Properly assembled through pilot holes, they will make clean, fast and accurate holes. Round standard metal punch units are complete units consisting of punch, die and draw stud. 1-7/32" (1.21 mm) actual hole size. Use with battery-powered, hydraulic, ratchet or manual drivers. Properly assembled through pilot holes, they will make clean, fast and accurate holes.