This is a spool holder designed to work with the 3D printed shelf created by the 3D Printing Nerd.

Link to the video where he makes them.

https://www.youtube.com/watch?v=u19MeZWK1mw

This is made to be printed without supports and in a flat orientation with the exception of the roller, that gets printed vertically and could possibly even be done in vase mode. You will need 2 of each part.

A little lubrication between the roller and support would be a good idea but should not be necessary.

To assemble you slide the roller over the support piece, then insert the notches in the support piece into the notches of the left anf right piece. Like in the 3rd picture the roller is in blue, support in black and left and right in red.

And for those curious I did hot glue 2 pieces of wood to a cardboard box to be able to take the picture.