Mayhew Pro 15070 150-Line Punch and Chisel Set, 14-Piece 14 piece punch and chisel set High-grade S-2 steel for superior tensile strength, toughness, and long life Professional black oxide finish for enhanced corrosion resistance Full shank heat treating and parabolic head to reduce mushrooming and chipping of struck end Hex body type Full shank heat treated Parabolic head to reduce mushrooming and chipping Black oxide finish for enhanced corrosion resistance Made of high grade S-2 tool steel for superior tensile strength, toughness and long life Made in the USA