The sockets are made of CrV 50BV30 steel, while the bits are made of very durable S2 steel. Other accessories are made of CrV 6140 and CrV 6150 steel. Sockets are equipped with the AS-Drive system, increasing the maximum torque by 25%, with full protection of the nut edges. The ratchet has a three-component handle and 72 teeth (5-degree working stroke) and the QUICK RELEASE system