Material: Steel Heavy-duty D-rings are made of high-strength steel, D-ring anchors have a breaking strength and load limit of 1,200 lb. Cargo D-ring anchors are made of exceptionally strong galvanized solid steel, prevent D-ring set includes: 10 D-rings, 10 mounting brackets, size of each mounting bracket is 6 x 2 x 0.3 cm, D-ring size is 4.5 x 4 x 0.6 cm, the hole at the top D-ring anchors require ropes, bungee cords or straps, both and basic hardware that can be easily attached to a metal or wood floor. Widely used as tie-down points on trucks, vans, kayaks, quads, caravans, vans, boats, and trailers, useful as wall hooks in garages. The D-ring attachment is ideal for securing loads on boats, cars, motorhomes, kayaks, ATVs, caravans, and is also ideal for indoor use. Ring dimensions: Ring dimensions: 4.5 cm x 3.2 cm x 0.5 cm Hook dimensions: 5.5 cm x 2 cm Hole diameter: 0.65 cm Type: Type: Tie-down ring Material: Galvanized steel Color: Silver Widely used Securing kayaks, quads, and