Pin Punches Heavy Duty [No. 256P] Single piece construction with hexagonal shank. Single piece construction imparts additional durability to the punch. Working ends are accurately ground and the punch body is in premium powder coated finish. High quality carbon steel accurately hardened and tempered so that the Pin will withstand continuous use and the striking end will not splinter. Diameter of Pin: 1/4 inch (6mm) Stock Size: 3/8 inch (10mm) Overall Length: 5-3/4 inch (145mm)