Description: Made from Stainless steel for best rust protection. Hook Straining Screw Adjusters. Twist The Body To Increase Or Decrease Tension. Used in many applications - marine - outdoor - wire riggings - catenary wire - rope tensioners, and so on. These are also known as Tensioners, Turn Buckles, Straining Screws, Barrel Strainers, or Open Body Rigging Screws. Specification: Material: Stainless Steel Color: Silver Size: Approx. S: Length: 97mm/3.82inch; Inner Diameter: 8.3mm/0.33inch; Outer Diameter: 14.8mm/0.58inch; Hook Width: 7mm/0.28inch; Pulling Distance: 138mm/5.43inch M: Length: 121mm/4.76inch; Inner Diameter: 8.3mm/0.33inch; Outer Diameter: 16.7mm/0.66inch; Hook Width: 8mm/0.31inch; Pulling Distance: 173mm/6.81inch L: Length: 145mm/5.7inch; Inner Diameter: 10.7mm/0.42inch; Outer Diameter: 20.8mm/0.82inch; Hook Width: 10mm/0.39inch; Pulling Distance: 215mm/8.46inch XL: Length: 192mm/7.56inch; Inner Diameter: 12.8mm/0.5inch; Outer Diameter: 26.3mm/1.04inch; Hook Width: 10.8mm/0.43inch; Pulling Distance: 280mm/11.02inch XXL: Length: 235mm/9.25inch; Inner Diameter: 14.8mm/0.58inch; Outer Diameter: 32mm/1.23inch; Hook Width: 12.4mm/0.49inch; Pulling Distance: 350mm/13.78inch Package Includes: 1 piece Eye Turnbuckle(2 Pack) Note: Due to the difference in the measurement , pls allow an error of 1 to 3mm. Pls check the performance of the spring before use.