Grade 80 eye hooks from Zip’s are self-locking and can be used with chain, rope and synthetic material. The hook is stamped with its size and can be attached to the chain with a master link. See the drop-down menu for available sizes and working load limits. Grade 80 Four sizes available Approved for overhead lifting Available in the following sizes Size Min. Break Strength WLL Safety Ratio 5/16″ 17,600 lbs. 4,400 lbs. 4:1 3/8″ 28,400 lbs. 7,100 lbs. 4:1 1/2″ 48,000 lbs. 12,000 lbs. 4:1 5/8″ 72,400 lbs. 18,100 lbs. 4:1 th, td { padding-right: 20px; } .product-table-top { display: block; max-width: -moz-fit-content; max-width: fit-content; overflow-x: auto; white-space: nowrap; }