Made from high hardness emery for durabilityEmery is a hard, rough mineral that makes diamond sharpener a fine, natural abrasive used on metal for stripping and derusting to 'eliminate burrs, they make sharpening a simple and efficient task. Perfect size Our product contains three different sizes of tips, 4.0 mm Chainsaw Sharpener is suitable for electric chainsaws (for 3/8 chain), 4.8 mm is suitable for small chainsaws (for 325 chain), 5.5 mm for large chainsaws (z 404 chains). Cost savingYou don't need to buy a new chain, it will save you a lot of money. Diamond chainsaw sharpeners make sharpening much easier, you can sharpen a chainsaw to new condition in just a few minutes. Ensure efficient cutting of your chainsawBy sharpening your Diamond Chainsaw Sharpener Burr with the sharpener, you will have less effort to cut through wood, because your chain will make cleaner cuts with well-sharpened blades. Sharpens well Extends the life Chainsaw motor lifeSharps very well, a sharpened chain cuts quickly and in a relatively straight line. A properly sharpened chain will extend the life of the chainsaw engine.