1/4" F x 3/8" M Locking U-Joint Adaptor | JET
Sockets made of the finest quality S.A.E. 4140 Chrome Molybdenum high impact steel Meets or exceeds U.S. Federal Specs: GGG-W-660A and ANSI specificationsPatented hex ball and socket design eliminates connecting pin for increased safety Ball and socket distributes force evenly for greater torque and longer life Eliminates broken connecting pins, the major source of U joint failures Drive anvil locks into straight position when flex function is not required Can be left on impact wrench and engaged only when needed Patented design combines drive adaptor and universal joint into one handy toolDrive Female: 1/4" Drive Male: 3/8"