This is my first shared designs. I replicated the design of a right angled bracket used in the construction of a commercial desk. However this bracket could be used where ever you need to join two sheets of chipboard, MDF or plywood at right angles. There are two sizes, as that was what was used on the desk. The hole takes a 5mm screw. Choose the infill density based on your strength requirements. It was designed in Sketchup using some plug-ins to ensure correct 3D printing. I had some issues with the complex shapes created by the chamfering plug-in.