Material - The heavy duty anchor bolt is made of 304 stainless steel, which is waterproof, abrasion resistant, corrosion resistant, never rusty and durable. Bearing capacity - The bolt has a very strong bearing capacity, which can hold up to 50 kg. Easy to install - Drill a hole in the wall, put the expansion screw into the hole, use a wrench to tighten the expansion bolt nut outside the wall hole. Application - Expansion bolts can be used in concrete and masonry. They are suitable for awning mounting, water heater installation, air conditioning mounting, home decoration, industrial engineering, etc. Package Included - There are 4 M8 expansion screw anchor bolts in the package.