* Carbon steel stud with four flat sides that increase surface area and paddle snow - a unique design by Woody's * Through-hardened with 5/16" threads * 60 degrees carbide insert provides durability and excellent hookup * For use in two-ply tracks and support plates * Proper nuts included * 1075 and 1175 series come with standard lock nuts * 1325 and 1450 series come with Woody's Short Big Nuts * 1575 and 1740 series come with Woody's Tail Big Nuts