Summary

A sturdy hook that clamps onto the IKEA MITTBACK, ideal for hanging a backpack or headphones.

Requires a long bolt and nut, I used a 70mm M6 bolt that I had left over from some random IKEA furniture.

Print the hook sideways with supports, and print the "T" section flat on its side without supports. 0.26 mm layer height and 3 walls worked fine for me strength-wise, I used PETG.