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: 38mm Type: TORX® Bit Socket Output Size: T30 Product Dimension (Refer Line Drawing Image): 3/8 Sq. Dr. TORX® T30 Bit Socket - Length 38mm