The Greenlee 7212SP-3/4P Speed Punch is a knockout punch that allows you to work quickly and efficiently. It works on materials such as mild steel, aluminum, fiberglass and plastic. The speed punch can be set up in just three steps, allowing you to complete the job faster. This 3/4" punch splits slugs in half for easy removal from the die or stud. It also has a die size of 1 23/200", making it compatible with other manufacturers' tooling kits. This speed punch can handle 10 ga mild steel, making it versatile enough for various jobs around the house or at work. The Greenlee 3/4" Speed Punch is perfect for any type of job where you need to make quick holes in sheet metal materials.