Specification: M8*60 (bolt diameter 6MM, screw length 60MM) Quantity: 5PCS Made of 304 stainless steel, it is durable and suitable for outdoor use. Offers good resistance to rust and can be used in damp environments. Hole size: Use a hammer drill bit with the same diameter as the expansion tube. Install it in an electric drill to bore into the wall. Drill depth should match the bolt length. The expansion tube must fully penetrate the wall. For increased strength, ensure the threaded portion is sufficiently long and the sleeve is seated deeply. Note that expansion screws must be installed into a structurally sound, rigid substrate. Tensile strength in concrete is significantly higher than in brick. When properly installed in concrete, the approximate tensile loads are: M6 - 120 kg, M8 - 170 kg, M10 - 320 kg, M12 - 510 kg.