wheel immobilizers and amp chocks

The Bal X-Chock by Adnik is everything you need to keep your RV or trailer tires stabilized. This chock features a ribbed, non-slip base to prevent it from moving. It has an adjustable locking system to fit snugly against your tires. The chock is made of durable polypropylene and has a bright yellow color so it's easy to see. It also has a built-in storage compartment for the included wrench.