A 60 carbide pin is surrounded by four flat sides, a patented design, to increase surface area and paddle snow. With performance in mind, this stud is popular among trail riders, cross country riders, and some racers. For use in two-ply tracks and support plates Through-hardened carbon steel with 60 carbide insert 15/16" head with anti-rotation lines Proper nut(s) included with stud(s). Woody's recommends snowmobile studs protrude 1/4" to 3/8" over the track lug.