Turnbuckle also named stretching screw,barrel strainer or bottlescrew, is a device for adjusting the tension or length of rope, cables, tie rods,and other tensioning systems.
Turnbuckles are most commonly used in applications which require a great deal of tension; they can range in mass from about ten grams for thin cable used in a garden fence, to thousands of kgs for structural elements in buildings and suspension bridges,
you also can find applications in Sports. It is a popular use for tensioning the ropes in professional wresting rings and boxing rings, where they serve as the attachment between the ring ropes and ring posts. The turnbuckles in these rings are covered with padding in order to protect the competitors. The turnbuckles come into particular play in professional wrestling where they are often put to use by participants as part of their offensive repertoire.
