These rings are steel to protects against corrosion and rust. These tie-down anchors are a necessary item for trailer cargo for E track tie-down system. they make it possible to tie down anything from furniture to motorcycles to equipment to musical instruments to refrigerators. Features -Color:As Shown.-Material: Steel.-Size: About8.50X8.00X6.00cm/3.34X3.14X2.36in.-Our ring tie down anchors is made from heavy-duty, rustproof and ultra-strong steel, which has long serving life.-Working load is heavy-duty. Can be used to move furniture and appliances for your friend and family.-Exquisite craftsmanship, carefully crafted, thick workmanship, durable and wear-resistant, easy to use.-Wide application, can tie down anything from furniture to motorcycles, from equipment to musical instruments, etc.-Suitable for tie-down tarp straps, rope, kayak tie-down straps, ratchet straps, chains, etc.Packing list: 10 x E Track Fittings