O Ring Tie-Down Anchors with E Track FittingsThis 2" E track O ring is exceptionally portable, can be easily mounted and detached from the E track slot with just a click, and can serve as a reliable anchor point for all your cargo tie down needs. The spring fitting can be inserted straight into a slot on the E track mounted on the floor or wall of your cargo vehicle. Ratchet and cam buckle straps, tarp straps, chains, grab hooks, S hooks, and all other tie-downs can be hooked or easily tied around the durable steel O ring and then anchored to the E track rail in your trailer, truck, or cargo van, making them safe and easy-to-use freight tie downs. Each E track O ring is made out of steel and weighs just one pound. This tie-down O ring gives you an assembly break strength of 4,500 pounds and a working load limit of 1,500 pounds. It is also available in a silver heavy-duty, with an assembly break strength of 6,000 pounds and a working load limit of 2,000 pounds.The total safe working load limit is determined by ADDING together: half of the working load limit of each tie-down that goes from an anchor point on the vehicle to an anchor point on an article of cargo; the working load limit of each tie-down that is attached to an anchor point on the vehicle, passes through, over, or around the article of cargo, and is then attached to an anchor point on the same side of the vehicle;PLUS the working load limit of each tie-down that goes from an anchor point on the vehicle, through, over, or around the article of cargo, and then attaches to another anchor point on the other side of the vehicle Remember: a securement system is only as strong as its weakest component. Stay safe!If you have any further questions, feedback, or issues regarding your E-track tie-down ring purchase, just email or give us a call at 866.998.0577; we look forward to hearing from you!