The bROK wheel chock reduces the risk of trailer roll, it features a rib faced design that grips the trailer tire for maximum anti-rotation security. Its curved contact face accommodates tires up to 17”. Made of highly durable polymer for years of service in multiple climates. bROK premium Towing and Trailering products are fostered by American engineering and ingenuity to provide you with the means of success in your challenging travels. bROKs highly engineered products give you the confidence needed to take on tough, demanding challenges. Whether cross county or across the farm, bROK brings powerful reliability and trustworthiness from the professional who demand performance. bROK is a partner with you, traveling with you and succeeding with you.