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Specification: M8 * 80 (bolt diameter 8 mm, screw length 80 mm) Quantity: 5 pieces Made of 304 stainless steel; durable and suitable for outdoor use. Offers superior rust resistance (can be used in wet conditions or even submerged in water). Select a masonry drill bit with the same diameter as the expansion sleeve of the anchor bolt and attach it to your power drill to bore a hole into the wall. The depth of the hole should correspond to the length of the bolt. The entire expansion sleeve portion should be inserted into the wall. Provided the threaded section is sufficiently long, a deeper placement of the sleeve results in a more secure hold. Please note that expansion bolts must be installed in a relatively rigid substrate. The tensile load capacity in concrete is five times greater than in brick. When properly installed in concrete, the tensile strength for M6, M8, M10, and M12 expansion bolts is 120 kg, 170 kg, 320 kg, and 510 kg, respectively. Versatile applications: Suitable for securing railings, shelving, lighting fixtures, equipment, and other objects to concrete, brick, and other solid substrates; ideal for both indoor and outdoor use.