Jewelers, gunsmiths, wood carvers and dental professionals all have a need for small sharpening stones. Spyderco's 400F Ceramic Files are fine-grit ceramic abrasive ready to debur hardened tools, molds, and even carbide. This set includes round, square, triangular, and slip-shaped (teardrop) files. Sold as a set of four and packaged in a snap-front suede pouch. Clean with a plastic scouring pad and powdered abrasive cleanser. Autoclave safe.