Welcome to our shop Specification: M8 100 (bolt diameter 6MM, screw length 100MM). Quantity: 2PCS. Made of 304 stainless steel, these bolts are durable and can be used outdoors. They have better rust resistance, making them suitable for damp or water environments without rusting. To install, select a hammer drill bit of the same diameter as the expansion screw expansion tube and attach it to an electric drill. Drill the wall to the same depth as the length of the bolt. The expansion tube should penetrate the wall, and the threaded part should be long enough for a deeper and firmer hold. Please note that the expansion screws should be mounted on a relatively rigid substrate. The installed tensile strength in concrete is five times that of bricks. After correctly installing an M6/M8/M10/M12 expansion bolt in concrete, its tensile load is respectively 120kg / 170kg / 320kg / 510kg. 100% Satisfaction: Our customers are our top priority. If you find any product problems after receiving the goods, such as damage or incorrect quantity, please contact the seller immediately. We try our best to provide you with satisfactory after-sales service.