Wera Adapters. Features: Various adapters compatible with Wera Drive Ratchet Handles as well as other branded similar items Features a ball stop groove to safely lock the socket, knurling at the rear end for manageability during manual use and is constructed from chrome-vanadium Specs: Model:781 A 1/4" Connection Part Description:1/4" To 3/8" Drive Adapter Color:Silver Package:Each