Surftech Rack Pads work great on any bar rack system. Rack Pads have built in 5cm thick foam padding for extra protection and attach with heavy duty velcro to your pre-existing vehicle rack or Surftech auto rack straps. When applied correctly, enjoy peace of mind that Surftech auto strap systems securely maintain appropriate tension even at freeway speeds during transportation. For best results in securing a board to your vehicle or rack, Surftech recommends that after looping the strap through the cam lock and adjusting to appropriate tension, tie a knot in the strap behind the cam lock.