Bookshelf Corner Brace 50 mm

thingiverse

Now that I've corrected the wobble in our towering stack of books, it's time to tackle the underlying issue causing the whole bookshelf to lean. This simple corner bracket is a tiny thing, measuring 50 mm on each side. The holes at either end are precisely 5 mm in diameter, making them an ideal fit for M4 screws (or M5s if you scale up your plastic or don't mind threading into it a bit).