The Lubi Boy is helping to do the maintenance on the rods of 3D printers (e.g. Ultimaker (S5, S3, 2+), Prusa (MK2, MK3, Mini, Mini+). It is possible to use it to apply lubrication to the rods easily and remove dust or dirt from them.
Addtional material:
Thanks to 3D Point for this idea (Lubi 2000)!
The author hasn't provided the model origin yet.