This is for a shower door that is designed for a specific "squarish" chrome frame.
This will not work on all shower door frames. The drawing is very important to see if it will fit on your shower door frame. The way you install it is also shown in the drawing. The interior is about 2 mm larger than the outline of the shower door frame. The shower door frame is not symmetric, so I think this will only work as an "outside orientation" hook. I will probably make a double hook (a hook on each side) later on. Even though the shape is thin the PLA plastic is having no trouble with the garments we are hanging. I am happy to say this hook fits very well on the door frame.