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: 1/4" Drive Shape: Square Length: 23mm Type: TORX® Socket Output Size: E5 Opening: TORX® Product Dimension (Refer Line Drawing 1/4 Sq. Dr. Impact TORX® E5 Socket - Length 23mm