Custom Quote: For large order bulk pricing, call 1-84-GOSTRAPS or email RatchetStrap.com Check your Local Jurisdiction for Specific Rules Generally: Used After Vehicle is in Park and Brake is Set to Prevent Any Accidental Movement At Least Two Chocks Should Be Placed Directly Against the Tire or Wheel Pyramid Base with Tire Fitting Ridges Thick Sidewalls, Single Cavity Base Crashworthy - Will not Harm Vehicles in Case of Contact nor Become Projectiles Rubber chocks effectively grip with anything they contact SAE Standard for Wheel Chocks, SAE-J348, defines the forces a wheel chock can expect under extreme conditions Eyebolt for Placement or Security Strap Custom Quote: For large order bulk pricing, call 1-84-GOSTRAPS or email RatchetStrap.com