A turnbuckle is a common rigging device that is used to adjust tension and reduce slack in a rope, cable, or similar tensioning assembly. Turnbuckles are a diverse product line that are used in a variety of applications across many different industries. They can be used in applications as simple as providing tension in a fence or perimeter cable, or something as complicated as the construction of a suspension bridge.
Turnbuckles and rigging scews are generally used to facilitate tensioning and fine adjustment of length in lifting assemblies where chain, wire rope or textile elements form the main component of the assembly. Also used for cargo restraint and suspension etc.