Pack of 20 M8x80mm expansion s. Made of high-quality 304 stainless steel. Strong, durable and hard-wearing, strong anchoring force, suitable for long-term use Rust and corrosion resistance, suitable for both indoor and outdoor use Easy to use: Only one hammer drill is used to drill a hole in the wall that has the same size as the expansion tube. Then insert the expansion hook into the hole and tighten the hex nut. The expansion is created by tightening a threaded bolt that draws a conical cone that extends a sleeve against the wall of the hole. Competitive price, but high quality, widely used in households and officers, Zunen, security doors and windows, front of the house, home textiles, communication devices, industry, M beln, DIY invention, construction fixings, etc. Screw size: M8. Length: 80 mm. Pre-drill hole size: 12 mm. Material: High-quality 304 stainless steel. Package includes: 20 x M8 x 80 mm expansion screws.Items from Sheng Xinshun's shop