Our Recycled Rubber Garage Stop is made from 100% recycled tires and designed for the home owner that continually finds it difficult to get in the garage without pulling in too far and hitting something. The flat tongue uses vehicle weight to keep the chock from moving. It also creates an insulated area between the tires of your car, camper, boat, or RV and the concrete floor, eliminating flat spots on your tires. Additionally, this garage stop helps to prevent vehicles from settling in the ground when used outdoors.