A manicure/pedicure set of tips for a rotary tool on a stand with a back post to put your rings on when working on your nails. Some appear to use the typical barrel shaped abrasive tubes that slide onto them. In other words, a dremel-like rotary tool bit set/stand targeted for the personal care/salon industry.

Look up 'professional electric manicure set' on Google.

It’s an ion resistor for a flux capacitor.

As some have mentioned they sure look like old nail file attachments.

Maybe one of my various sisters-in-law had one or my roommate from the University of Minnesota Law School or maybe the Puerto Rican male dance student I had for a about a week at BYU in their dorm as that roommate.

I have seen something like that before but cannot place it.

Possibly dental type instruments?
 

Possibly Dental type instruments?

Anyone know what this is?
 

Is the base hard plastic? Please show a picture of the underside.

Anyone know what this is
 

The entire thing, base and all is aluminum. There is no grit or teeth on the attachments. They are not screwed into the base; they appear to be pressed to place. Some are tight, and some will spin. There is no writing, nor any type of mark at all.

was it left from previous owner? Could you contact them for the fun of finding out what it is?

No previous owners 😬

Maybe something you picked up at a Villages Art Fair? That could be where I saw one like it.