Just a mini mitre box to help you cut picture frames and other items at 45 or 90 degrees. It can be used with a hacksaw to cut metal extrusions with a rectangular cross section of up to 30mm x 19mm, so most metal picture frames and fly screen extrusions and other things I'm sure.

If you want to alter it or resize it, as always I include the original Fusion 360 design file. Just hit Modify > Change Parameters.

Happy cutting :)