Nut Grip, 1/4” drive, Short, 12 Point.    NUT GRIP® is Ko-ken's special design for non-magnetic nuts/bolts to be held firmly in 6-point sockets and now 12-point sockets. The 12-point design consists of three balls held in place by a spring steel ring.   Input Drive Size 1/4" Sq. Drive Output Size 3/8" Type: 12-Point Nu 1/4 Sq. Dr. 12 point Short SAE NUT GRIP® Socket - 3/8