Gripon (4 Pack with 2-1/2inch Hardware) Heavy Duty 3/8" 5,000lbs Anchor Point Surface Mount Bolt On D Ring Tie Down

Each kit comes with 2- 3/8" x 2-1/2" long carriage bolts, 2 - washers, and 2 - 3/8" nuts Heavy Duty, 3/8" Forged Steel with Zinc Plated for Weather Protection with 5,000lbs Break Strength D Ring Bracket can be Bolt On or Weld On for Easy Installation  Dimensions: 10mm thick Ring, 2.25" Diameter  Will work on Trailer, Enclosed Trailer, Van, Truck, Flatbed, Truck or Anchor Point Bed