Stanley Proto J2S2 Proto Punch and Chisel Set, 12-Piece Made from S2 steel and specially heat-treated for greater strength and durability Modified parabolic striking end to help reduce mushrooming and chipping Black oxide finish to help prevent rust corrosion; extending tool life and performance A polished identification panel on one of the flats is marked with the tool number and size in a black inlay Set offers a wide range of sizes to handle a variety of jobs