Aluminum Extrusion Corner Bracket

These are corner brackets designed to stiffen the frame of a 3D printer that uses an aluminum extrusion frame, but they are probably useful as generic 2020 extrusion brackets. The hole in the plane perpendicular to the screw holes is intended for mounting screws or cables that could be used to further stiffen the aluminum extrusion structure.

The holes are meant for M3 screws, and T-Nuts are needed to secure the brackets to the aluminum extrusion.