Premium Stainless Steel Material: The expansion bolts are made of stainless steel, which is strong and wear-resistant, high temperature resistant, not easy to deform and break, and can be used for a long time. The bolt surface is anti-oxidation, has good waterproof, anti-rust and anti-corrosion effects. Expansion Design: Expansion screw bolt consists of expansion pipe, gasket, hexagonal nut and screw. Expansion pipe is cut from seamless steel pipe. Compared with ordinary bolts, bolts with expansion pipes have greater tension after expansion and are stronger and safer. Please rest assured to use. Easy to Install: Installing these expansion sleeve anchor bolts are very convenient and quick.You only need to drill a hole in the wall with the same size as the expansion tube with a drill bit, place the expansion screw in the hole, and tighten the hexagon nut with a wrench. After the expansion screw is stressed, the expansion tube will open, and the end of the expansion bolt will hang on the