Set - There are 6 pieces Expansion screw Anchor bolts M8 in the package. Material - The intensive anchor bolt is made of 304 stainless steel, waterproof, resistant abrasion, corrosion, never with rust and durable. Load capacity - The bolt has a very large load capacity, can support up to 120 kg. Easy to install - Drill a hole in the wall, insert the expansion screw into the hole and tighten the dilatation bolt nut on the outside of the hole in the wall. application - the Expansion screw can be used in concrete and masonry. They are suitable for assembly of awning, water heater installation, air conditioning fixing, interior decoration, industrial engineering, etc. Size: M8x60 Color: Silver Material: Stainless steel Dimension: Total length: 65 mm Diameter of the expansion tube: 11.4 mm Package: 6 x M8 EXPANSION ANCHORS Hex bolts Principle of use: Dilatation is created by squeezing a threaded bolt, which dilates the sleeve into a peddling to press against the walls. How to install: 1. Use a drill (11.52mm) to drill a hole of the same diameter as the expansion tube on the wall; 2. Place the expansion screw in the floor or in the hole. 3. Tighten the hex nut outside the wall hole with a key; 4. Once the force is applied, the expansion tube will open the tail and will form a peddler to be inserted into the wall. Application: These two expansion hook bolts can be used For fixing the water heater, air conditioning, awning and other heavy household items. On the other hand, these bolts are suitable for garages, hangars, workshops, construction sites, joinery, etc. Note: 1. You must prepare a drill with a diameter of 11.5 to 12 mm. 2. Pay attention to the depth of the hole before installation. The depth of the hole is determined by the thickness of the article you hang. For example, the length of the screw is 60 mm and the thickness of the article you want to suspend is 3 mm. The depth of the hole you need is about 55 to 57 mm. 3.All the data above are measured manually. Please allow a 1-3mm error.