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: 140mm Type: TORX® Bit Socket  Output Size: T15 Product Dimension (Refer Line Drawing Image) 3/8 Sq. Dr. TORX® T15 Bit Socket - Length 140mm