1/2 impact socket sets contain impact sockets with a drive end that measures 1/2 inch. The drive end of 1/2 inch impact sockets attach to an impact driver or wrench that also has a 1/2 inch drive. 1/2 inch impact socket sets contain a range of different sized impact sockets that have a tough design enabling them to handle a higher level or torque than standard sockets. ½ impact socket sets are used in a wide range of industries including automotive repair, machinery maintenance and construction where extra torque is required to tighten or loosen bolts