Packaged Included: This set includes 6pcs of 4040 T-shape joint plates in black, 30pcs of M8 T-nuts, and 30pcs of M8x16mm hex screws, providing a complete solution for assembling aluminum extrusion frameworks. Specification Details: Each bracket is designed for 40x40 series aluminum profiles, featuring robust carbon steel galvanized M8x16mm hex screws and M8 T-nuts for a secure and durable connection. Easy Installation: The bracket plates are equipped with 5 pre-drilled holes, allowing for easy alignment and attachment using the included M8 screws. This ensures a firm and stable build, ideal for constructing 3D printers, CNC routers, and other industrial frameworks. Versatile Application: Perfectly suited for connecting 4040 series aluminum profiles, these brackets are essential for DIY enthusiasts looking to build 3D printers, CNC machines, or any custom aluminum frame structures. Color: As Shown Material: Aluminium Alloy Package Contents: (6 * T-shaped plate+30 * M8 slider nut+30 * screw+1 * wrench) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.