Size: 4pcs M8x100mm expansion bolts, total length: 100mm, expansion tube diameter: 67.5mm. Thread diameter8mm. Weight: 195 g The bolt has a very strong load-bearing capacity and can withstand a weight of 100 kgMaterial: Expansion bolts are made of 304 stainless steel, 304 stainless steel has excellent rust resistance, corrosion resistance and good crystal corrosion resistance. Wear-resistant, glossy surface, long-term durability, anti-rust, anti-corrosion, anti-breakage. Works well in humid indoor and outdoor environmentInstallation instructions: The expansion tube is made by tightening a bolt. The bolt draws a tapered taper to extend the sleeve against the wall of the hole. 1. Drill a hole in the wall. 2. Clean the sand and dirt in the hole. 3. Insert the expansion screw into the hole. 4. Use a wrench to tighten the expansion bolt nut outside the wall hole.Wide Application: Hex expansion screws can be used in concrete and masonry. They are suitable for installing awnings, installing water heaters, fixing air conditioning, fencing, security doors and windows, interior decoration, industrial projects, workshops, garages , etc expansion bolts.