This is a corner bracket for bolting together box panels with 1/4" bolts. Great for materials that are too thin or fragile to screw or nail into from the thin side. They are made to be aesthetically pleasing as they were designed for use with a disassemblable lexan display case.

I scaled these by 2.5% with pla for a good fit in the nut cavities.

Inventor file included for modification purposes.