These rubber wheel chocks are contoured to fit any wheel and are lightweight for easy storage. The highly visible colour makes it more likely to be seen and removed before driving off and also makes it easy to be backed into. All-weather construction makes for reliable performance in any climate and treaded grips works on slippery surfaces. Can be used for a large range of purposes, perfect for chocking cars, trucks, trailers, small airplanes, RVs, dumpsters, boats, horse trailers, vans, and more to prevent your vehicle from rolling away.