A chain grab hook that has ears is better than a standard grab hook. A variety of destructive tests were conducted on 3/8-inch-diameter Grade 7 rescue chain, using two types of grab hooks ...

With Grade 70 chain and grab hooks that have a WLL of 6,600 lbs., for example, failure occurred typically between 33,000–36,000 lbs. of load regardless of grab hook direction across the link of ...