Used for: 2040 aluminum extrusion profile 6mm slot. 2040 aluminum extrusion profile connector set widely used for build industrial aluminum frame structures, 3D printers, CNC routers, CNC laser cutters and robotics projects. etc. Package Content: 10pcs 90 Degree solid cast aluminum corner bracket,40pcs M5 T-nuts, 40pcs hex screw,1pcs wrenches tool. M5 slide in T-nuts and hex socket cap screws are made of high quality carbon steel with zinc plating, good rust resistance, high hardness and long service life. If you encounter any problems with this item, please do not rush to return it, feel free to email us via your order ID and we will do our best to resolve your issue. 2040 aluminum extrusion profile connector set widely used for build industrial aluminum frame structures, 3D printers, CNC routers, CNC laser cutters and robotics projects. etc. Package Content: 10pcs 90 Degree solid cast aluminum corner bracket,40pcs M5 T-nuts, 40pcs hex screw,1pcs wrenches tool.