Black Rubber Wheel Chock - EACH These rubber chocks prevent your commercial truck from moving while parked, with a ribbed slope to fit the shape of the tire. The chocks feature a load capacity of 40 tons. OSHA safety regulations require power industrial trucks to be chocked with at least two wheel chocks to prevent the vehicle from rolling whenever it is parked. These heavyweight rubber chocks have a load capacity of 40 tons and prevent your truck from rolling or shifting during loading and unloading. Molded from heavy-duty industrial-strength thermoplastic rubber and features a ribbed 37 degree slope to fit the shape of the vehicle tire. Formed with a bottom void for maximum traction on gravel. Includes a large 3-3/4 L x 1-1/4 H easy grip handle for convenient carrying and a 3/8 D pre-drilled fastener hole in the handle.