Item Type: Expansion Screw Hook Color: Silver Material: 304 Stainless steel Maximum Load: 120 kg / 264.6 lbapprox. Applicable Wall: Concrete, lightweight concrete, solid brick, natural dense stone, porous brick, sand-lime brick Total Length: Approx. 90mm / 3.5in Expansion Tube Length: Approx. 38mm / 1.5in Opening: Approx. 16mm / 0.6in Punch 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 tube 2. Put the expansion hook into the hole and tighten the hex nut with a wrench 3. After the force is applied, the expansion tube opens, and the tail hangs on the wall Package List: 10 x Expansion Screw Hook Note: If the load has a large vibration, it may loosen.