Disc Cutter - Circle - 10 Punches - Rubber Base - for Jewelry Making - SFC Tools 28-590 Cut circles out of sheet metal. Comes with 10 punches, a round steel disc cutting block, and a rubber base to hold everything. Will cut up to 20 gauge metal Rubber block will ease the cutting process and protect your work surface. Punch sizes (inches): 0.13, 0.25, 0.38, 0.5, 0.63, 0.75, 0.88, 1, 1.13, 1.25