Features The Proto® socket bit has a hex opening that allows the bit holder to take the torque load. Made from a heat-treated alloy for wear resistance which minimizes distortion for a long life. Insert Length / 1 7/8 in Tip Size / 1/2 in Overall Length / 3 5/8 in Drive Size / 1/2 in Socket Depth / Standard Material / Alloy Steel Finish / Full Polished Chrome Number of Points / 6