1. This chainsaw sharpening kit is specifically designed for sharpening chainsaws. It features a precise positioning system that allows the chainsaw sharpener to quickly and easily determine the position of the chain. It can sharpen the chainsaw in just 3 - 5 seconds. After use, the chainsaw will be as sharp as new, eliminating the problem of chain dullness. 2. This chainsaw sharpener is made of durable aluminum alloy and stainless steel, offering high wear - resistance and corrosion - resistance. It can sharpen the chain with high precision and durability. It is equipped with 3 interchangeable grinding heads with a two - in - one design, perfectly combining portability and practicality. 3. This chainsaw sharpener measures 8.2 x 6 x 5.8 cm and has a light and simple design. It is lighter and more compact, maximizing your portability. It can be carried around and is very suitable for outdoor use. 4. This chainsaw sharpening kit has 2 holes in the 30 - degree direction and a fixed rivet, making it suitable for various types of chains. Our chainsaw sharpener is compatible with most chainsaws, such as 14/16/18/20 1/4/3/8 chainsaws. 5. The chainsaw sharpening kit does not require electricity. Simply connect the chainsaw chain sharpener to the position that needs sharpening and then turn the handle effortlessly to complete the sharpening. It ensures accurate sharpening every time, and the locking function guarantees precise sharpening.