One of the most popular tools for drilling holes in metals, heavy-duty mag drills allow you to drill holes in thicker, harsher metals, like steel, using specialty drill bits called cutters. The metal is held in place beneath the drill, while the operator turns a handle, lowering the rotating cutter into the metal to produce a hole. These holes can be differing sizes, depending on the size of the cutter you’ve used, allowing the workpiece to be used in a variety of applications, including using the holes to affix the metals to other pieces.