1Surface oxidation treatment, resistance to rust and high temperature 2Can be used in humid environment or even water without rust, very durable 3Anti-slip bump design, easy to grasp the wall, not easy to fall off and slip out 4Clear internal bolt pattern of expansion screw, possess uniform and deep thread pitch, good fastening effect 5Suitable for concrete, lightweight concrete, solid brick, natural dense stone, porous brick, sand-lime brick Item Type: Expansion Screw HookColor: SilverMaterial: 304 Stainless steelMaximum Load: 120 kg / 264.6 lb(approx.)Applicable Wall: Concrete, lightweight concrete, solid brick, natural dense stone, porous brick, sand-lime brickTotal Length: Approx. 90mm / 3.5inExpansion Tube Length: Approx. 38mm / 1.5inOpening: Approx. 16mm / 0.6inPunch Bit Diameter: Approx. 10mm / 0.4inHow to Use:1. Use a drill to drill a hole in the wall that is the same size as the expansion tube2. Put the expansion hook into the hole and tighten the hex nut with a wrench3. After the force is applied, the expansion tube opens, and the tail hangs on the wall 10 x Expansion Screw Hook If the load has a large vibration, it may loosen.