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: 3/8" Drive Shape: Square Length: 26mm Type: TORX Socket Output Size: E16 Product Dimension (Refer Line Drawing Image): D1 Si 3/8 Sq. Dr. TORX® E16 Socket - Length 26mm