Wheel chocks are an easy way to stabilize an ATV inside of a truck bed or trailer when traveling on rough roads or long trips. These are crafted of durable steel tubing and are powder-coated for lasting resistance to rust and corrosion. Mounting plates are fastened to your truck bed or trailer. The chocks are easily removed using quick-release fasteners. Fits tires up to 12 wide. Per 1. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Color: Rust.