TorkCraft - Chassis Screw Sheet Metal Punch Size: 25.4 mm The Tork Craft Chassis Screw Sheet Metal Punch is a hand tool used to punch a hole through sheet metal. It is a very simple tool that consists of a punch, die and screw. To set up the punch, first drill a pilot hole into a piece of sheet metal with a step drill bit, place the die over the draw stud before inserting the stud through the pilot hole. The punch is then threaded onto the tip of the draw stud and brought close to the sheet metal. - For cutting clean holes fast - Cut into sheet metal up to 1.625mm mild steel - Also for industrial use WARNING: Using any tool can be dangerous. Always select the right tool for the job.