PROGRIP 822610 Truck and Trailer Cargo Surface Mount Tie Down with D Ring: Medium Duty (Pack of 1) Surface mount anchor with d-ring application ideal for medium duty use, acting as the foundation in tie down technique while moving cargo in your truck or trailer Constructed with zinc plating to help prevent corrosion in extreme weather conditions Sturdy tie down rings feature a break strength of 5000 lbs; surface mount usable with most bolts and screws Easy to use and allows ease of mind that your cargo is secure during transport To use simply bolt surface mount to wanted area and use d-ring application with hook, rope, or bungee to secure cargo (bolts not included)