1.Material: fully dropforged by carbon steel or CR-V steel 2.Surface:jaw teeth induction quenched 3.high quality ,low price MODEL NO: CR-I10271Pipe Wrench* Drop Forged,Heat Treated CR-V SteelSize: 1/2",1",1-1/2",2"1.Material: fully dropforged by carbon steel or CR-V steel 2.Surface:jaw teeth induction quenched3.high quality ,low price high quality CR-V steel Pipe Wrench