General description This 2020 Series Aluminum Profile Set Connector is ideal for constructing aluminum frame structures, including 3D printers, CNC routers, CNC cutters, and robotics projects. The set includes high-quality components designed for durability and performance. Technical specifications Material: Carbon Steel Color: Silver Nut Size: M5 x 10mm Screw Size: M5 x 10mm Package Contents: 20pcs 20mm 90 Degree Cast Aluminum Angle Bracket, 40pcs Galvanized Steel M5 x 10mm T-Slot Nuts, 40pcs M5 x 10mm Steel Hex Socket Cap Screw Bolt Measurement allowed error: +/- 1-3 cm Usage Building aluminum frame structures 3D printing applications CNC machinery assembly Robotics projects Home and office appliance assembly Communication equipment assembly Ship assembly and other machinery industries Other information Cast aluminum corner brackets connect 20mm aluminum extrusion pieces at a 90-degree angle High-quality steel T-Nuts are galvanized and nickel plated for rust resistance Hex Socket