Keep heavy mining and construction vehicles parked safely in place with the urethane industrial wheel chock. Each heavy-duty wheel chock can support up to 120 tons and is manufactured from oil- and chemical-resistant urethane. Rated for tires up to 105" in diameter and ideal for the construction and mining industries, it features a recessed carrying handle for easy setup and instructions molded right on each chock for proper usage. The hollow bottom is designed for maximum friction on gravel. Optional brackets are available for easy mounting right on the vehicle.