产品描述：
Impact Sockets
Impact sockets and accessories are manufactured from high quality chrome molybdenum steel. Black oxidised finish with permanent laser etched markings. Conform to: Metric DIN 3129, Imperial SAE USA Federal Standard GGG-W-660A.
Impact Wheel Nut Sockets 1/2" sq. dr.
Socket sizes: 17, 19 & 21mm. Colour coded for easy identification. Can be used with retainer rings or pins.