●Chainsaw Sharpening Stone The 4.8mm whetstones fit most hand saw chain sharpeners. ●[Fit]:Suitable for sharpening most .325 saw chains, compatible with rotary tool. ●[Use]: Widely used for mini drill, air flow battery rotary tool, cutting machine, hand grinding tool, etc. ●[Application]:Also suitable for metal polishing, manicure, woodworking, mold making and so on. ●[Note]: Please confirm the size before purchasing.