Teng Tools impact sockets are specifically designed for use with power tools and air tools. Manufactured in chrome molybdenum in accordance with GGG-W-6608 these sockets ensure the highest quality. These regular 6-point metric impact sockets have a 3/4in Square Drive and have a locking pin and retaining ring facility.The TEN940527 Impact Socket has the following specifications:Size: 27mm.Length: 52mm.PTDTEN940527