These are my finger cuffs. The chain design is by Ferjerez on thingiverse but I added the rings I made the chain long enough to spin around one finger or cuff 2 fingers together without being too uncomfortable. I would recommend a brim because the chain links have a very small surface area but I was able to print this on my monoprice mini v1 (equivalent to a model T) so it should work on just about everything.