What is it
 

I’m pretty darn sure it’s accessory bits for a sewing machine.

Likely it came in from an overlap from a parallel universe.

I have seen one of those before but cannot pull up the memory just yet.

Not sure what they are but they do not appear to be Dremel tool bits because I do not see any teeth or grinding surfaces on any of them.

Rotary files and adapters for disks. The only thing weird is the home made plate to mount them while in storage. If the detach then they are useable, if not display.

a dead drone roach!!!

CMM probing tips

Its a Wiskenliber Autoblitzer Filter key. Used on the very expensive model 6X1R with the hydraulic cantonlever donglemover. When it comes time to change that filter someone's gonna be looking for that!

dial indicator tips is the right answer, common tool in manufacturing.

It is a KGB torture device from the 1960's.

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.