alloy steel material Adjustable wide opening head shape operating mode needle - Wide opening lightweight short handle for maximum versatility. - Forged chrome vanadium steel construction. Conforms to ANSI specifications. - Precision dryer, flexible and efficient, round hanging hole, easy to carry. - Wider contact surface, stronger, more reliable and anti-slip between the jaws and the nut - Suitable for hygienic maintenance, mechanical maintenance, car maintenance, maintenance of pipe nuts in narrow spaces