SKT 1/2 DR 1-5/16 12 PT The TorquePlus? internal design minimizes fastener rounding, helps to extend fastener life, and allows the user to more easily turn worn, rounded, or rusted fastenersProto Sockets are ideal for use on stubborn or damaged fasteners, and also on fasteners made from soft materialsThe TorquePlus? design is a high performance drive configuration which allows for quick and easy socket engagement to the fastener flats, not the corners Drive Size 1/2 inNo. of Points 12Drive Type SquareOpening Size 1 5/16 inHead Width 1 41/64 in opening side , 1 3/64 in drive side Overall Length 1 3/4 inMeasuring System InchLocking Type BallMaterial Forged Alloy SteelFinish Nickel ChromeWt. 1/2 lb