Set - There are 6 pieces expansion screws M8 anchor bolts in the package.Material - The heavy duty anchor bolt is made of 304 stainless steel, waterproof, abrasion resistant, wear resistant corrosion, never rust and durable. Load capacity - The bolt has a very large load capacity, can hold up to 120 kg. Color: Silver Material: Stainless steel Dimension: Total length: 65 mm Expansion tube diameter: 11 .4mmPackage:6 x M8 Expansion Anchors Hex BoltsPrinciple of Use:Expansion is created by tightening a threaded bolt, which expands the sleeve into a barb to press against walls.How to install:1. Use a drill bit (11.5-12mm) to drill a hole of the same diameter as the expansion tube on the wall;2. Place the expansion screw into the ground or hole.3. Tighten the hex nut outside the wall hole with a wrench;4. After force is applied, the expansion tube will open the tail and form a barb to insert into the wall. Easy to install - Drill a hole in the wall, insert the expansion screw into the hole and tighten the bolt nut expansion screws outside the hole in the wall.Application - Expansion screws can be used in concrete and masonry. They are suitable for awning assembly, water heater installation, air conditioning fixing, interior decoration, industrial engineering, etc.