General description Eye & eye forged straining screw, open body turnbuckle designed for tightening, tensioning, and adjusting various materials such as chain, rope, and cable. These straining screws are particularly popular in the caravaning industry and feature a galvanised finish for long-lasting protection. Technical specifications Quantity: 4 Product Code: SFFOREE16/04 Available sizes: 5 mm: A=5, B=70, C=7.5, D=117, E=164 6 mm: A=6, B=109, C=9, D=165, E=249 8 mm: A=8, B=108, C=10, D=175, E=251 10 mm: A=10, B=126, C=14, D=198, E=275 12 mm: A=12, B=125, C=16, D=230, E=315 16 mm: A=16, B=169, C=22, D=335, E=450 20 mm: A=20, B=202, C=24, D=335, E=515 21 mm: A=21, B=220, C=29, D=400, E=540 23 mm: A=23, B=250, C=29, D=445, E=610 29 mm: A=29, B=255, C=31, D=480, E=630 31 mm: A=31, B=295, C=36, D=525, E=705