This Stanley 3-piece Cold Chisel set is a top quality set made from chrome vanadium steel for increased strength and durability. For cutting and shaping wrought iron, cast iron, steel, brass, bronze, copper and aluminium and for cutting bolts, nuts and rivets. Contains 1 of each: 140 x 10mm (5.1/2 x 3/8in), 150 x 13mm (6 x 1/2in) and 170 x 16mm (6.3/4 x 5/8in).