EASY TO USE: Just insert a ring into a slot on an E-track rail or single by pressing the lever of the spring fitting. You can then use the O-ring as a tie down for straps, ropes, cables, wires, and chains that hold down cargo from motorcycles to kayaks to cargo bars to pallets to refrigerators VERSATILE: This Heavy Duty anchors to be used for cargo management in caravans , trailers , trucks , flatbed equipped with E-track rail(not included) when moving furniture , ATVs , tools , boxes , pallets , , farm equipment , landscape , bicycles , motorcycles etc. The O-ring easily attaches any straps , ropes , bungee cords , chains etc STRONG and DURABLE: These E Track Clips are made out of high-strength steel. Ultimate Assembly Breaking Strength: 4,500 pounds Awesome Safe Working Load: 1,500 pounds per pack. That means that these 10 rings can bear up to 15,000 pounds together! ANTI-CORROSION: This durable E Track Ring Tie down Anchor is made out of steel that is galvanized with color zinc to prevent corrosion and rust, can be used in adverse weather and withstand harsh conditions. perfect for outdoor use. Colour: gold Material: metal Package Contents: 10 x E-Track O Ring Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.