These nifty shackles fill a very specific need, which is to attach a shackle to the end of your lifting chain. Often times our customers are left with bulky setups, using multiple couplers, shackles or hooks when all they really want at the end of their chain is a rigging shackle with a pin. Gunnebo has made these shackles to attach directly to your lifting chain, and they're available in the five most common chain size, from 9/32" - 5/8". Individually proof-tested and factory certified. Generous interior dimensions make for quick and easy rigging. Made from Grade 80 alloy steel with a safety factor of 4:1.