The chain sharpener is designed to make sharpening your chainsaw easier and faster. That's why we designed our chain sharpener to be the crank type. It can be used without being connected to a power source. Simply shake the sharpener to sharpen your chainsaw in seconds. Most scenarios where we use chainsaws take place in nature. When you carry an electric pencil sharpener, the load increases even without electricity. This chain knife sharpener is portable, lightweight and simple in structure, which makes it very convenient to use outdoors. Chainsaw Chain Sharpener Kit: The manual sharpener works as a pencil sharpener. To sharpen a saw chain with a chain sharpener, place the clip on the bar, place the locking pawl on the tooth, insert the alarm into the guide sleeve and turn the handle. Cleaning shiny chains in just 3-5 seconds is quick and easy. Durable: The hand chainsaw sharpener is made of high quality alloy, which is wear-resistant and durable, and the handle is stable. The working part of the chainsaw sharpener can be maintained with lubricating oil to extend the life of the unit. As a professional chainsaw sharpener manufacturer, this product combines portability and practicality. This will keep your chainsaw sharp for a long time.