EFFECTIVE SHARPENER This electric saw sharpener offers a quick and easy way to sharpen the knife. Press the tip of the sharpener onto a firm surface and you'll get a sharp edge in seconds. CUSTOM DESIGN It is suitable for 14/16/18/20 inch chainsaws. The saw chain blade has 1-2 holes, and there are 2 pins on the saw sharpener (one of the pins is removable) for securing the electric saw blade. GOOD PERFORMANCE The bottom of the electric saw sharpener is made of high-quality stainless steel springs. If the electric saw is inserted into the sharpener but the size of the saw is not large enough to contact the sharpening stone, press the spring. The spring allows the sharpener to fit a wider range of chainsaw sizes. CONVENIENT AND QUICK The sharpener is lightweight, compact, easy to carry, and suitable for outdoor use. Your hands do not need to touch the sharpening stone. HIGH QUALITY The chainsaw sharpener is made of durable plastic and high-quality sharpening stones to ensure safety and quickly restore the performance of the chainsaw. It helps improve work efficiency.