Premium Material Our 2020 extrusion corner brackets are made of aluminum alloy material it is excellent features in high abrasion resistance rust proof and stability The surface of these t slot 2020 aluminum extrusions is sandblasted anticorrosion and antirust pollutionfree Packaging Includes 10pcs 6mm 2020 series 90 degree solid cast aluminum corner brackets 20 pcs M5 x 10 mm Lslot nuts 10 pcs silver 6 mm 2020 Series 3Way corner bracket connector 40 pcs carbon steel M4 x 10 mm screw bolt 2 pieces of wrenches corresponding to screws Advantage Concealed corner brace the 2020 Series 3Way End Corner Bracket and 2020 corner brackets can be completely hidden in the slot of the aluminum extrusions 2020 Connector Fit These extrusion corner brackets2020 aluminum extrusion end caps are suitable for 2020 european standard aluminum profiles slot 6 mm Multiscene Use Our corner bracket connectors can be widely used for building industrial aluminum frame structures 3D printers CNC routers laser engravers Fish tank robotics projects