【Quick Sharpening】The new serrated knife chain sharpening device provides a simple and quick method for sharpening the chain. The chainsaw can be sharpened and cleaned again in 2-4 seconds. 【Easy to use】 Just place the bracket on the pole, time on the tooth position, insert the burrs into the guide plate, and then rotate the handle. 【Wide application】 Standard 45° front cutting edge angle, anodized aluminum fixed device and a set of guidelines with removable crank, which can be used for 14-20 inch chainsaw chains. 【Precise positioning】 The ratchet ensures precise and repeatable tooth placement. 【Safety assurance】 The chainsaw sharpening tool is lightweight, easy to carry outdoors, and protects both hands from injury.