Easy to use-The spring E track clamp for the E-Track system is easy to use. There is a spring trigger at of the accessory for easy application and release. Versatility-E Track O-rings can be used for securing applications from pallet cargo to cars and recreational vehicles, and are a good choice when e Track straps are . Compatibility- Spring e-track anchors and e-track accessories are compatible with for E-series and A-series tracks, and can easily secure cargoes in enclosed trucks, trucks or trailers. Specifications-2 inch E track tie-down strap O-ring, End joint type: O-ring colour: gold Material: metal Package Contents: 4 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.