Jewelers, gunsmiths and dental professionals all at some time have a need for small sharpening stones.
Spyderco's Round Ceramic File is fine-grit ready to debur hardened molds, even carbide. Comes packaged in a plastic tube. Clean with a plastic souring pad and powdered abrasive cleanser. They are autoclave safe.
This file is also available as a set of four 400F, packaged in a snap-front suede pouch. Please see related items below.