I wanted to mount my pool poles used for cleaning but did not want to drill holes into my fence. I created these hooks that grab onto the rail and bolster.

These may not work on your fence if you have smaller or larger bolsters/rails. Hooks are positioned so they are held away from the fence bolsters as the large posts are 4 inch. These should be snug on the fence, but not hard to remove/install.

The dimensions of my fence are:

Rail: 73mm tall by 82mm Wide

Bolster: 35mm x 35mm

Requires supports, which are are included in the print profile for the part that hooks around the bolster. Printed in PETG with 0.6 nozzle and .3 layer height.