According to the manufacturer, control, efficiency, and safety are markedly enhanced with these tungsten-carbide Screw-In Studs for Boots/Tires. Their wide-auger threads are designed to ensure they stay put once installed, which is accomplished via cordless drill or manually by hand with a proprietary installation tool. Being available in various lengths allows one to customize insertion depth to further enhance traction under various terrain conditions and application (e.g., ice, snow, mud, slimy rocks, frozen pavement).