Closed Type Pulley Block Single Sheave With Hook 7511-LG RIGGING®, also known as hook single sheave block.
It is easy to use, use conveniently, it can change the direction of pulley, steel rope and can lift high weiht cargoes, especially series of pulley combined with windlass, mast and other lifting machinery.
Pulley and Block are common lifting mechanisms used for rigging and can be usually used with wire rope.