Jewelers, gunsmiths and dental professionals all at some time have a need for small sharpening stones. Spyderco's Ceramic File set includes four ceramic files: round, square, triangular and slip. All four stones are fine-grit, ready to debur hardened molds, even carbide. Clean with a plastic souring pad and powdered abrasive cleanser. They are autoclave safe and packaged in a snap-front suede pouch.