The hooks conform to API Spec 8A/8C and industry standards of SY/T5527,and API monogram is stamped on them.
The specific structure in the barrel allows the engine oil in it and the hook body’s cavity to possess favorable hydraulic buffer function.
The braking mechanism enables the hook body to lock in the range of 360°by every 45°intervals. The safety blocking device can avoid the swivel bails slipping out.
The main parts of hook adopts high-strength alloy steels and are subject to non-destructive test(NDT).