This is a compact miter box that helps you easily cut frames and other objects with a precision angle of 45° or 90°. When used with a steel saw, it can efficiently cut rectangular metal profiles with a maximum cross-sectional size of 30mm×19mm - whether it's common metal frames, screen window profiles, or other related products, it can handle them with ease.

If you want to customize or adjust the size of this bevel box, I have attached the original Fusion 360 design file as always. You can easily do this by clicking on "Modify" → "Change Parameters".

Wish you a pleasant cutting experience!