retaining bracket 90degrees

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/igHWft67bdo
This simple bracket was designed to hold an Eleksmaker laser engraver/cutter in place on an mdf baseboard
(mdf=medium density fibreboard,a sheet of pressed synthetic "wood" .In your particular country its may be called something else).
I will use a fastscrew to attach each corner to the board,trapping the machine,but still making it removable for maintenance