This is a disc sander table, which is driven by a Dremel 395 or similar. I use a rubber mount to hold the sanding disk, which came with a Dremel grinder kit. But there are universal kits on Amazon. You can stick Velcro to the disc and use pads off Amazon or glue the sanding paper directly on. The tool can use discs up to 75mm/3". I use cellular rubber to fit the Dremel and dampen its vibration a bit.
The clamp screw needs to be printed twice.

This is a tool to cut small diameter rods or tubes using a Dremel. I use it with a Dremel 395. It has the Dremel thread (M18x2,25/ANSI 3/4-12) in the guide part, so you can just easily screw the Dremel in. You will need a small tube or rod with a 10mm diameter to connect the two parts. The guide part might need some sanding to fit in the base, I wanted it to fit nicely with little play.
I also made a non-metric version for the hinge. You can use a 3/8" axle for the hinge instead of the 10mm axle. The files with "_38" in the filename are the 3/8" axle version. I hope the tolerances are okay to fit the axle in.
Also added a support-block, for supporting the loose end of the tube/rod to be cut.
EDIT 2019/01/26
I added the .step files for the 3/8" hinge version, so everyone is free to make their own mods.
EDIT 2019/02/04
Modified the base part, so the flex guide part would not collide anymore with the base. Since I don't have the flexible extension for the Dremel, I cannot test the flex guide part.
If you are using…