Includes 4 sizes of rectangles, ranging from approx 5/8" x 3/4" to 1" x 1 1/4" (15 x 21 to 27 x 30 mm). The cutting end of each tempered, high carbon tool steel punch is machined to a slight angle: a characteristic of all premium disc cutters. This angle greatly facilitates the shearing action of the punches. For use with soft metals 18 gauge (01 mm or .040") and thinner. Provided with a wood storage box and a urethane pad to dampen rebound during use.