This Rectangle Cutter Set includes 2 sizes of cutters: approx 7/8" x 1 3/8" (22 x 35 mm) and 1" x 1 5/8" (26 x 42 mm). Constructed from tempered, high carbon tool steel. The cutting end of each punch is machined to a slight angle to facilitate the shearing action of the punch. Provided with a wood storage box and a urethane pad. The pad dampens rebound, which otherwise can mar the shape being cut out. For use with soft metals 18 gauge (01 mm or .040") and thinner.