Shackle

A shackle (or shacklebolt), also known as a gyve, is a U-shaped piece of metal secured with a clevis pin or bolt across the opening, or a hinged metal loop secured with a quick-release locking pin mechanism. The term also applies to handcuffs and other similarly conceived restraint devices that function in a similar manner. Shackles are the primary connecting link in all manner of rigging systems, from boats and ships to industrial crane rigging, as they allow different rigging subsets to be connected or disconnected quickly. A shackle is also the similarly shaped piece of metal used with a locking mechanism in padlocks. A carabiner is a type of shackle used in mountaineering.

For other uses, see Shackle (disambiguation).

Fully buried Dyneema soft shackle open, eye with ring closed

Dyneema soft shackle open, eye opened using the ring

Dyneema soft shackle with [diamond knot] head locked

Soft shackle with [diamond knot] head, and [Turks head] collar open

Soft shackle with [diamond knot] head, and [Turks head] collar locked

Two with [diamond knot] head, and buried eye with openining string, one with ends-buried-button-knot and eye adjustable by crossing sides.

Edwards, Fred (1988). Sailing as a Second Language. Camden, ME: International Marine Publishing. 0-87742-965-0.

ISBN

Hiscock, Eric C. (1965). Cruising Under Sail. Oxford University Press. 0-19-217599-8.

ISBN

Marino, Emiliano (1994). The Sailmaker's Apprentice: A guide for the self-reliant sailor. Camden, ME: International Marine Publishing. 0-07-157980-X.