from the description it sounds like an eye we use to lift skips/bins. We have four lock posts on each side of a bin and two chains with the eyes on each side. These lock over the posts and the boom lifts the bin. If you use the outer posts on esch side the lift is higher allowing you to kift the bin to the front of the tray. Anyway thats what it sound like. On the bins you are slow lifting a known max weight not a stretch/snatch pull, so they are rated differently to a tow/snatch device.