A shackle is a detachable circular metal component used to connect various rope head eye rings, chain rings, and other rigging. The detachable buckle consists of two parts: the main body and the horizontal bolt. Some horizontal bolts have threads, some have pins, and the common types are straight and circular shackles. Shackles are often named according to their intended use, such as the anchor shackle used on anchor rods; The anchor chain shackle used on anchor chains; A weighing rope head release buckle used on the rope head
