SURE GRIP RUBBER WHEEL & TIRE CHOCK AVOID DANGEROUS ACCIDENTS WITH THIS CAREFULLY DESIGNED WHEEL CHOCK THAT FEATURES BUILT-IN TRACTION GRIPPERS TO CREATE MAXIMUM FRICTION BETWEEN THE TIRE AND THE PARKING SURFACE. RECOMMENDED FOR CARS TRAILERS TRUCKS OFF-HIGHWAY CONSTRUCTION EQUIPMENT BUSES AIRCRAFT AND OTHER HEAVILY LOADED VEHICLES. ALSO GREAT FOR RV'S BOAT TRAILERS AND OTHER RECREATIONAL VEHICLES. MEETS OSHA REQUIREMENT 1910.178(K)(1) THAT STATES ""THE BRAKES OF HIGHWAY TRUCKS SHALL BE SET AND WHEEL CHOCKS PLACED UNDER THE REAR WHEELS TO PREVENT THE TRUCKS FROM ROLLING WHILE THEY ARE BOARDED WITH POWERED INDUSTRIAL TRUCKS"". OPTIONAL STRONGA HREF""HTTP//WWW.GLOBALINDUSTRIAL.COM/GCS/PROD/30024910/I/PRODUCTINFO.WEB10 FOOT WHEEL & TIRE CHOCK SECURITY CHAIN""10 FOOT WHEEL & TIRE CHOCK SECURITY CHAIN/A/STRONG ATTACHES EASILY TO HELP PREVENT CHOCKS FROM BEING STOLEN. WARNING: This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65warnings.ca.gov - 1,3-Butadiene