48 pcs * Through-hardened carbon steel stud for ice, snow and grass drag * Flat, steel tip grabs surface area and propels across the finish line * Woody's uniquely designed track-trapping head provides unbeatable stud rigidity and support * For use in two-ply tracks and support plates * Propre nuts included *1000-1205 series comes with standard lock nuts *1325-1860 series comes with Woody's Short Big Nuts NOTE: When using 1.630" and 1.860" it is essential to have proper clearance and tunnel protection. Competition use only.