What are turnbuckles used for?

What are turnbuckles used for? 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.

How do turnbuckles work? A turnbuckle, stretching screw or bottlescrew is a device for adjusting the tension or length of ropes, cables, tie rods, and other tensioning systems. It normally consists of two threaded eye bolts, one screwed into each end of a small metal frame, one with a left-hand thread and the other with a right-hand thread.