Proto® 1/4" Drive Hex Bit Sockets Features and benefits Specifications Features and benefits Bit holders have a hex opening to hold the bit allowing the bit holder to take the full load of torque.Made of heat-treated alloy steel.Polished chrome finish. Specifications Drive Size [in] 1/4 Finish Full Polish Length Type Standard Unit of Measure Fractional Tips Hex Specification AS SAE AS4984A Print Warranty Share