Where are these used?

[benmychree]

Carbide tooling will feel heavier than HSS and are only very mildly magnetic. I doubt that there would be more than a handful of members that use coolant fed tooling.

 

[bratexllc]

And I completely forgot to mention... (CRS)
These drill bits are all coolant fed through. Are coolant fed machines common amongst our hobby group?
Is there any way to identify whether they are carbide or not?

Carbide will be significantly heavier than steel and be much less magnetic.