Ko-ken Nut Grip Socket Set: a game-changer in socket technology. Crafted with precision, our 3/8" drive, 6-Point, Semi-Deep Length Chrome Hand Socket Set incorporates the innovative NUT GRIP® design. Unlike traditional sockets, our NUT GRIP® system revolutionizes the way non-magnetic nuts and bolts are handled. Engineered with two balls secured by a spring steel ring, our sockets ensure a firm grip on nuts and bolts without relying on magnets. This unique design features ball bearings and a coil spring arrangement on opposing flats. As a nut or bolt is inserted into the socket, the ball bearings exert pressure on the springs, securely holding the fastener in place.