Expansion Hooks can be used in fastening fences, awnings, air conditioners, cement bricks, concrete masonry, ceilings, burglarproof, doors and window canopies, fixation, home decoration, and engineering.SpecificationSize: M6Color: SilverMaterial: 304 Stainless SteelTotal Length: 90 mm / 3.5 inchTube Size: 40 x 10 mm / 1.6 x 0.4 inchScrew Diameter: 6 mm / 0.23 inchPacking List: 6Pcs x M6 Expansion HookAdvantage1. This Expansion Hook is made of 304 stainless steel. It has a strong structure and strong bearing capacity. It is rust-proof and corrosion-resistant. It is durable and can be used for a long time.2. This hook does not require complicated operations and is easy to install. Expansion is produced by tightening the bolt, which pulls on the tapered cone, causing the sleeve to expand against the hole wall.Instruction 1.