Tensioners are produced globally and distributed for industries requiring steel jaw and claw type attachments such as those found in sail rigging, construction scaffolding and many others safety requirements for heavy loads. The working principles of the tensioner must have screws that work clockwise and counterclockwise to close the eye or opening between two steel products or barrels. Turnbuckles are made of: eye and eye, jaw and jaw, toggle and toggle, barrel pinHook and eyeIron or SteelThey can also be custom designed for particular industry needs. They are most commonly made from steel but can also be forged from iron. The purpose of sturdy steel or metal forged iron turnbuckles is to pull tons of weight safely and securely. The turnbuckles are adjusted until the barrel is closed and the constraint tightly compressed. Tensioners, while essential for rigging sails, tents, scaffolding and military uses, retain a life-saving purpose in all fields of personnel transportation and deployment. Tensioners must meet the highest requirements...