This disc cutter set contains 10 circle punches to cut circles out of sheet metal. It will constantly cut the same dimensions every time. It contains 10 punches and a round steel disc cutting block. The block has a lever-style unscrambling device, so it will hold sheet metal more firmly while you work on it. This sheet metal disc cutter will cut up to 20-gauge metal and can be used on a rubber mat or block to ease the cutting process and protect your work surface.
You will need to remove all punches from block to place your metal sheet in the slot; then use the right size of punches to cut your required size of circle. Screw block tightly to ensure sheet is firmly placed and ready to cut. Strike the oblique side of the punch with a heavy mallet until it pierces through the sheet metal. Be careful of your fingers and other items on your work surface.