I was inspired by vintage Iron Work I-Beam construction to design and make this paper-towel holder. I wanted a paper towel holder for my workshop, but didn't see anything I liked; After seeing an old photo of a skyscraper construction, I got the idea to fashion this with I-Beam type construction using nuts & bolts. I also like to use magnets when I can, so I incorporated magnets into the hinge mechanism to keep the hinge "closed", but also allow it to open easily for changing paper towel rolls.
This can be mounted under a cabinet or to a wall.
As a side note: this can also be used as a toilet paper roll holder.

CountertopChallenge

Printed Parts Needed:
center_mount_b - X2
drum_2 - X2
i_beam_short_final - X4
mount_a_hex_nut - X4
mount_b_3 - X2
mount_b_3_mirror - X2

Hardware Needed:
M3 X 12 mm screw - X2
M3 washer - X2
M3 X 10mm screw - X32
M3 X 20mm screw - X4
M3 nylock nuts - X38
8mm Diam X 3mm magnets - X4
No. 8 wood screws to suit shelf / wall - X4