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: 28mm Type: TORX® Bit Socket Output Size: T10 Output Shape: TORX® Product Dimension (Refer L 1/4 Sq. Dr. Z-Series TORX® T10 Bit Socket - Length 28mm