Grip Studs are rugged tungsten carbide studs that deliver the traction necessary for winter equipment without the drudgery and breakage associated with chains. They screw easily into tires, tracks, and boot soles with a handy installation bit, and can be removed at season’s end. The wide-auger design ensures they stay right where you need them. Grip Studs, a division of Deardorff Fitzsimmons Corp.