Disc Cutter - Doming Set - 21 Punches - for Jewelry Making - SFC Tools - 25-588 Will cut circles, form domes, and form cones out of sheet metal. It comes with 21 punches: 3 of each size - one flat, one doming, and one cone. Comes with a square steel disc cutting block w/ 7 circle slots that fit the punches, and a wooden box to store everything in. Cuts up to 20 gauge metal