Nilight 10 Pieces D-Ring Tie Down 1/4 Inch Stainless Steel D-Rings Trailer Heavy Duty 1/4″ 2400 Pound Capacity for Ratchet Tie Down Straps Car Truck Bed Cargo. Tie down ring anchor made from strength steel, and painted with black protective coating to ensure they are not corroded and rusted during long working hours.