D-ring fasteners made of high-strength steel for added strength and durability can support up to 1200 lbs per ring. Cargo tie-down rings are made of extremely durable solid zinc-plated steel to prevent corrosion and rust. D-ring anchors add a convenient anchor point for ropes, bungees or straps. Widely used as tie-down points on trucks, vans, kayaks, ATVs, caravans, vans, boats and trailers, they are useful as wall hooks in garages, warehouses and organized workshops. The anchoring system works well on all surfaces and floors. These D-rings come with mounting brackets but do not have bolts. Recommended to install with 1/4" diameter carriage bolts to fit the 9/32" holes on the mounting clips. Once these D-rings are mounted, they can be used as tie-downs for motorcycle straps, bungee cords, tarp straps, small chains, ratchet and cam straps, ropes and other tie-down systems. Ideal for securing kayaks, ATVs and other powersports equipment, bicycles, refrigerators and similar appliances,