This is a mitre box specifically for cutting 90° corners with 12-14mm LED diffusers for when a using a corner profile. This arrangement produces some interesting cutting angles, so a mitre box is very useful for consistency. The box can be used for both internal and external corners by flipping over the diffuser and turning the box around. If you have a use for this model, then you've probably already built a mitre box for the profile itself and so should find this familiar to use.

Printed in PETG with 15% infill, no supports. I'm fairly confident that similar materials will also work well.

The SketchUp design file is included.