The Wera 05003578001 8790 HMB 3/8'' Zyklop Socket allows applications both in manual as well as power tools. ''Take it easy'' Tool Finder with colour coding according to size - for simple and rapid accessing of the required tool. Featuring a good grip to allow easy pick-up even with oily hands. Ball stop groove, for hex head bolts and nuts; chrome vanadium steel, matt chrome-plated.