Eye Sling Hook G80 10mm 3.15T (Pair)Sling Hook G80 10mm 3. 15T This 3. 15T Rated 10mm G80 Eye Sling Hook is a great option for attaching the safety chain of the trailer with the vehicle, providing a secure attachment in the event the trailer coupling fails. The safety latch prevents detachment from the chain or bracket, providing a more safe and secure connection with the heavy lifting load. Additionally, the yellow painted finish gives an aesthetic appearance to the hook. Features: 3.