1、Use the wedge shape slope to promote expansion and generate frictional binding force to achieve a fixed effect. 2、Using excellent 304 stainless steel material, has high strength and corrosion resistance, not easy to rust and deform. 3、Commonly used to fasten protective fences, awnings, air conditioners, etc. on cement, bricks and other materials. 4、The kit contains 10pcs stainless steel open cup hook, which can be used and replaced at any time. 5、These stainless steel expansion hooks have standard openings and threads for more precise fixing. 10 x Expansion Hook Item Type: Expansion HookMaterial: 304 stainless steelApplication: Generally used for fastening on cement, bricks and other materials such as protective fences, awnings, air conditioners, etc. Specification Tube Length B(Approx.) Wire Diameter D(Approx.) Diameter E(Approx.) Opening F(Approx.) Outer Diameter S(Approx.) Total Length L(Approx.) Outer Width W(Approx.) Mounting Hole Diameter(Approx.) Mounting Hole Depth(Approx.) M6 38.3mm / 1.5in 5.1mm / 0.2in 13.3mm / 0.5in 18.1mm / 0.7in 9.6mm / 0.4in 91.1mm / 3.6in 32.0mm / 1.3in 10.0mm / 0.4in 50.0mm / 2in M8 48.2mm / 1.9in 7.0mm / 0.3in 17.6mm / 0.7in 23.0mm / 0.9in 11.5mm / 0.5in 114.3mm / 4.5in 42.0mm / 1.7in 12.0mm / 0.5in 60.0mm / 2.4in M10 49.0mm / 1.9in 8.6mm / 0.3in 18.4mm / 0.7in 24.8mm / 1in 13.6mm / 0.5in 116.5mm / 4.6in 48.0mm / 1.9in 14.0mm / 0.6in 65.0mm / 2.6in M12 49.0mm / 1.9in 10.6mm / 0.4in 23.9mm / 0.9in 33.0mm / 1.3in 15.5mm / 0.6in 150.5mm / 5.9in 60.0mm / 2.4in 16.0mm / 0.6in 70.0mm / 2.8in