Turnbuckles are used to provide a means for length adjustment and tensioning. They are used with guys for masts, towers, tall structures and engineering applications. Turnbuckles generally have elongated eyes or clevis end fittings for connection to shackles, wire rope assemblies, pad eyes and the like. The main benefit of a turnbuckle is that it may have a greater ability to be tightened under load. Also, there may be a wider scope for providing means for locking while in service.