TORX® is recognized as one of the three most efficient fastening systems because of their ability to transfer greater torque, reduce load and virtually eliminate tool slippage. Input Drive Size: 1/2" Drive shape: Square Length: 63mm Type: TORX® Universal Socket Output Size: E12 Output Shape: TORX® Product Dimension (Re 1/2 Sq. Dr. Universal TORX® E12 Socket - Length 63mm