1. L Angle Bracket – Please note, due to lighting effects, monitor brightness, and manual measurement, there may be slight variations in color and size between the photo and the actual item. Thank you for your understanding. 2. Corner Bracket – Compatible with most metric aluminum extrusion profiles from Series 20, this angle bracket connection ensures robust support for your projects. 3. Aluminum Alloy Angle Bracket – Made from high-strength and durable aluminum alloy, this bracket offers superior strength and rigidity, making it ideal for various applications. 4. Angle Bracket Joint – Perfect for constructing 3D printers, 3D carvers, CNC routers, CNC plasma cutters, robotics projects, machine safety guards, and workstations. This versatile corner bracket is essential for any DIY or professional project requiring reliable structural support.