Milwaukee SHOCKWAVE™ Impact Duty™ 3/8" Drive 1/4" 6 Point Socket extreme impact durability in high torque applications and features long-lasting stamped size markings for quick and easy socket identification. This socket is constructed of high-strength forged steel and features a non-slip hex geometry that prevents fastener rounding. For added convenience, the socket’s dual-hole design and ring groove makes socket attachment and removal easier. This socket is optimized for use with 3/8-inch drive impact wrenches, drivers, ratchets, and adapters. Model Number: 49-66-6100