Punch unit includes punch, die, draw stud and nuts | Can be use with hand or hydraulic drivers | Align accurately and produce burr-free holes | Punch up to 14 gauge mild steelAmazon.ca Product Description PUNCH UNIT-DD 1. 37Dx1. 12 FLATS From the Manufacturer Greenlee 14 gauge(2.0mm) double D punch unit 60098, punch unit for 1.375-Inch(A), 1.125-Inch(B) holes. Unit includes punch, die, draw stud and nuts. For manual or hydraulic drivers. Optional adapter for hydraulic drivers, Greenlee 33967.