Description : Brand new and high quality. A turnbuckle is a device for adjusting the tension or length of tensioning systems. The tension can be adjusted by rotating the frame,to Increase Or Decrease Tension. Material: Galvanised Steel Overall Length: 125mm To 170mm Width Of Body: 13mm / Width Of Screw 5mm Diameter Of Eye Hole: Inner 8mm / Outer 15mm Hook: Inner Gap 9mm A turnbuckle is a device for adjusting the tension or length of ropes, cables, tie rods, and other tensioning systems. It consists of two threaded bolts, one screwed into each end of a galvanised steel frame, one with a left-hand thread and the other with a right-hand thread. The tension can be adjusted by rotating the frame, which causes both bolts to be screwed in or out simultaneously, without twisting the eye/hook bolts or attached cables