Williams 14-644 1-3/8-Inch 1/2-Inch Drive Deep Impact Socket 1 3/8-Inch deep impact socket Overall length of 3 1/2-Inch 1/2-Inch drive Super torque lobular openings are for greater turning power without deforming the fastener Designed for maximum engagement on 6 point fasteners and is suitable for use with pneumatic and electric impact wrenches