Shoehorn holder

Shoehorn holder. Holds Shoehorns.
Tape the small part onto a wall using a Tesa Powerstrip (Small size should exactly fit into the small retract). Make sure the rounded corners are facing upwards.

Next, simply slide the knob over the holder and it should hold. The cutout has 0.3mm tolerances all around, if that's to little for your printer you can slightly scale down the holder (1-3% should be sufficient)