This is a wall mount for the SHURHOLD Marine Mate 6" Boat Deck Brush with 48" Threaded Wood Handle.  The mount is intended to be directly screwed into the wall, whether into drywall anchor sleeves or into a stud.  I printed this in PETG but PLA should work just as well.  This -should- keep the head and handle from touching the wall, as seen in the photos, but ymmv.  I'm certain this design can be optimized further.

Print settings I used:
0.2mm layer height
4 wall layers
6 top and bottom layers (1.2mm)
15% infill
Material: PETG
Supports: On