The self locking structure of the hook will be automatically closed under the situation of load lifting, so that the lifting is much safer.

It is forged by special alloy steel with high intensity and high toughness, and then it is heat treated;

It can be matched with G100 chain;

The performance is increased by 25% compared with G80 products;

Each work piece should pass testing at 2.5 times of working load limit;

We should carry out sampling and 20000 times of fatigue testing;