Guardian Industrial Products Rage Powersports DH-WC-2 Wheel Chock (Loading Dock Tandem 41' for OTR Truck Trailer) Wheel block chock for OTR and hauler trucks with tandem wheels up to 41" Integrated handle can be used to tie-off wheel chocks for quick removal Resists oil, gas, solvent and water Heavy duty thermoplastic rubber with a 40 ton capacity Restricts wheel movement per OSHA safety guidelines 1910.178(k)(1), 1910.178(m)(7), and 1910.111(f)(9)