SS Turn Buckle is a device for altering the tension or length of ropes, cables, tie rods, and other tensioning systems. This is how the term tensioning system (also known as a straightening screw, bottlescrew, or stretching screw) is described. Despite being a relatively small hardware component, SS Turn Buckle can support up to 75,000 lbs of weight and is suitable for use in large apparatus installations.