4 Pieces M6 Universal Open Cup Wall Concrete Expansion Hook Anchor Bolt 304 Stainless Steel Screw Hooks The product is shipped based on the color or size of the main image of the product page. Note: This expansion screw has four sizes: M6, M8, M10, and M12. Please see our photos for more specifications. Packing: Includes 4 expansion bolts. 304 stainless steel material, corrosion-resistant, rust-resistant, fixed and durable. The surface is flat and smooth without burrs, high-quality workmanship, strong and durable. The screws are sharp and clear, and the force is even and not easy to slip. Installation method of expansion hook: First use a drill to drill a hole the same size as the expansion tube on the wall, then put the expansion hook into the hole, tighten the hexagon nut with a wrench, and finally open the expansion tube tail tube and hang it on the wall after being urged. Installation method of expansion hook: First use a drill to drill a hole of the same size as the expansion tube on the wall, then put the expansion hook into the hole, tighten the hexagonal nut with a wrench, and finally open the expansion tail tube and hang it on the wall after being urged. Professional standard expansion bolt hook, very suitable for garage workshop, heavy construction, carpentry and home DIY. It has a wide range of applications, including concrete and masonry, ceilings, etc.