Disc Cutter, How-ToA13Z
Remove all punches from the steel disc cutter.
Slide the metal item or sheet between the plates of the disc cutter.
Place the size punch you want into the appropriate opening on the cutter base, putting the end of the punch that is flush (not rounded) into the opening. Using the mallet, brass and nylon hammer, or hammer of your choice hit the punch gently and repeatedly until the punch pushes through the metal. Make sure to keep the metal sheet stable while you are striking the punch--any movement will cause the punch to leave marks on the metal sheet and not give you a clean disc.
Remove the sheet from the cutter; the cut-out disc will be separate from the sheet.