DMT FCS-3KIT Kit Of 3 Diafold Chain Saw Files In Pouch Lightweight, fold & go handles protect chain saw file when not in use or unscrew chain saw file and return file and handle to storage pouch Coarse diamond to transform a dull edge Sharpens knives faster than conventional stones with DMT's monocrystalline diamond surface No oil is needed-sharpen dry or with water Durable construction will provide years of consistent performance and reliable service