Paper towel wall mount

I bought new roll of paper towel for my workshop, it seen so big, but there's always missing free space into workshop, so i start thinking why not put them to one of upper closet door.

Few minutes later i got stl files for super simply but super working "paper towel wall mount"

I print it with 0,4 noozle 0,2layer high and need about 4 hours for two pieces.

I use brass rod with outer diameter 13mm and inner diameter 12mm, but i attach the files also for 10mm, 12mm, 13mm and 16mm, there's also solidworks file so you can just fix one measure and save as stl.

Rood need to be pushed into holders, and it hold them on it's place rock solid (no turning while running paper of.