Preformed Line Products Bg-2146 Big-Grip Dead-End. Galvanized Strand. For Use On: Extra High Strength, Siemens Martin High Strength, Utilities Grade. 5/16", Strand Construction 3W / 7W, Actual Diameter .312/.312", Approx. Length 33", Black, Rated Holding Strength (Lbs) 11,200.(Percent Of Strandes Rated Breaking Strength - 100%)