【Package Include】 24pcs 2020 series corner brackets, 48pcs carbon steel galvanized M5 x 8mm T-Slot Sliding Nuts, 48pcs M5 x 8mm screws, and 1pc hex wrench. 【High Quality Material】2020 series aluminum profile connector set is made of aluminum alloy material, which has excellent characteristics such as light weight, high strength, high wear resistance, rust resistance and stability. The surface of these 2020 aluminum extrusion hardware is sandblasted to prevent corrosion and rust, sturdy and long-lasting. 【Good Choice】2020 extrusion corner bracket set can quickly and easily connect and fix aluminum profile components, and can maintain stable performance in various environmental conditions, this removability makes the aluminum profile structure with higher flexibility and reconfigurability, they are a good choice for fixing aluminum profile structure. 【Widely Used】 2020 series aluminum profile connectors are used to build various structures and frames, such as industrial aluminum frame structures, 3D printers, CNC routers, laser engraving machines, electronic equipment architectures, machine bases, stands, robotics projects, and more. 【Easy to Use】 These aluminum profile corner bracket connect 20mm aluminum profiles at 90 degrees and fit most metric 20 series aluminum profiles and 6mm slot 2020 European standard aluminum profiles.