This is a small miter guide, for assisting in the more delicate cuts, with guide slots for 90, 45 and 22.5 degree cuts.

The sides of the box are strengthened with 14 M4 x 40mm button head screws, helping protect against breakage in the layer lines and the inside corners are set back to protect sharp edges of the object being cut.

There are also 4 inset mounting holes, for securing the box to a workbench or similar.

The model prints easily without support, and it's only under the screws from the bottom that there is a little overhang, but it's easily removed and covered by the screw heads.