DC Cargo Mall 10 D-Ring Tie-Down Anchors, 1/4" Strong Steel D Rings for Loads on RV Campers, Trucks, Trailers, Boats, Vans; Heavy Duty D Ring TieDowns for Kayaks, Motorcycles, Deliveries, ATVs These mini D-rings are made of exceptionally heavy duty solid steel, 1/4" diameter thick. They are strong and durable, and can handle a load up to 400 pounds. That means that this pack of 4 rings can bear up to 1,600 pounds. See the description below for a clear guide on how to figure out your tiedown limits when loadings trucks and trailers, especially if you're up for DOT inspection... Small bolt-on D rings are the most convenient pieces of tie down metal available. Generally used as tie-down anchors on trucks, pickups, campers, vans, boats, and trailers, they are handy as wall hooks in organized garages, warehouses, and workshops as well. See the last picture for a clear visual image of all the dimensions to be sure that this is the tie down you need. Please realize that these rings come with mounting brackets but not bolts. The recommended installation would be with bolts 1/4" diameter round to fit the 9/32" holes on the mounting clips. We welcome questions, comments, and feedback. Once these Drings are mounted, you can use them as tiedown anchors for motorcycle straps, bungee cords, tarp straps, small chains, ratchet and cam straps, ropes, and other tie-downs. Ideal for securing kayaks, ATVs and other powersport equipment, bikes, refrigerators and similar appliances, delivery and moving boxes, camping gear, etc. INVEST IN THE BEST. DC Cargo Mall is THE MANUFACTURER of these awesome D rings. We stand confidently behind our products' quality with a 100% payment-back happiness guarantee. There is no risk - like em and use em, or chuck em and $ returned! Contact us via Amazon or call us at 866-998-0577. We're here to help. By the way, feel free to check out this tie-down anchor in a 10-pack or as a medium mini 3/8" diameter, as well as our other many valuable tie down products available.