⭐【High Quality Material】：Chain saw sharpener is made of high quality diamond material, treated with titanium plating process, the grinding head has excellent durability, and the best sharpness and performance can be achieved when grinding. 【Multiple sizes】：Includes three different sizes of sharpeners, 4.0mm for electric chainsaws (for 3/8 chain), 4.8mm for small chainsaws (for 325 chain), 5.5mm for large chainsaws (for404 chain).Three specifications, can be combined according to different usage scenarios, convenient and practical, effectively improve work efficiency. ⭐【High hardness and durability】：Robust structure, steel parts are particularly strong, long service life, uniform grain, fine polishing, stable and durable.It can be used for honing and descaling metal to remove burrs and make sharpening work easy and efficient.Particularly suitable for use with chainsaw chains, can grind chainsaw teeth quickly and effectively. 【Easy to assemble】：The chainsaw sharpener is very easy to assemble and can be sharpened without removing the chain, reducing the number of chain changes and increasing efficiency.The grinding effect is very good, the cutting speed of the sharp chain is fast, the cutting line is relatively straight. ⭐【Powerful Function】：Chainsaw stone files are mainly used for grinding, machining and repairing shapes, engraving, wire cutting, welding milling and so on.Particularly suitable for chainsaws, it can sharpen chainsaw teeth quickly and effectively.