Sturdy Durable: Bolts made of stainless steel are sturdy durable, these expansion screw latches are wear-resistant, rust and corrosion resistant. Easy to install: Drill a hole on the wall, put the expansion screw into the hole, use a wrench to tighten the nut of the expansion bolt outside the wall hole, easy to install, labor saving work, can be done independently. Size: 4 Pcs M10x80mm hex nut expansion bolt, total length: 80mm, expansion tube length: 54.1mm, expansion tube diameter: 12.1mm, thread diameter: 7.7mm. Applicable Scenes: Fixing Bolt Anchors suitable for installation of water heater, fixed air conditioner, home decoration, industrial engineering, air conditioning fixation, fences, security doors and windows,can be used in concrete and masonry. Package includes: 4 pieces M10 X 80 Stainless Steel Expansion Screw Bolts. Note: It does not include other things, the color is based on the first picture, and the other pictures only show the effect Due to the differences between