The Wera 8790 C Impactor Deep Set 1 contains eleven 83 mm long socket wrenches. The Wera 8790 C Impactor Deep socket wrenches can be used with electric or compressed air impact drivers. The Impaktor deep sockets have a hole and ring groove for the locking pin and O-ring, and the "Take it easy" tool finder is color-coded according to size, so you can easily and quickly find the tool you need. The rear end of the percussion sleeves is ribbed for a good grip when operated by hand. Can be used with 12.5 mm (1/2") powered impact drivers. The impact technology ensures an above-average tool life even in extreme conditions. The hexagonal profile allows for high power transmission with the simultaneous accuracy and protection of the profile. The hexagonal profile puts less stress on the nut or the edges of the screw head, such as the twelve-sided profile. removal.