6 Surface Mount D Rope Ring 1/4" Tie Down Truck Trailer Cargo Van 4" Round Bolt On. Built tough, rugged and weather resistant - Quality D-Ring Pan Fitting Tie Down Mount - factory tested and made from the highest quality industrial grade materials. Plus, the product is covered by a 1 year warranty! Included: SIX (6) 4" round surface mount D-Rings with base (bolts not included)