Jewelers gunsmiths and dental professionals all at some time have a need for small sharpening stones. Spydercos Ceramic File set includes four ceramic files round square triangular and slip teardrop. All four stones are finegrit 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 snapfront suede pouch.