Nut Grip, 3/8" Drive, Deep, Chrome Hand Socket Set.  NUT GRIP® is Ko-ken's special design for non-magnetic nuts/bolts to be held firmly in a 6-point socket.  The design consists of two balls held in place by a spring steel ring.  INCLUDES: SKU Output Size 3350M-8 8mm 3350M-10 10mm 3350M-11 11mm 3350M-12 12mm 3350M-13 1 3/8 Sq. Dr. Deep NUT GRIP® Socket Set 8-19mm - 11 pieces