Hex profiles are one of the most common fasteners found in the automotive, industrial, and agricultural markets today. Our hex bit sockets give service professionals a tool for application from bumper to bumper on millions of vehicles. Manufacturered with premium quality tool grade steel and as two-piece construction for even stronger performance Set includes 3/8" square drive sizes: 1/8", 5/32", 3/16", 7/32", 1/4", 5/16" and 3/8".