IMPORTANT NOTE: THE PRODUCT DOES NOT INCLUDE THE MACHINE. EASY TO INSTALL AND USE: The simplicity of this chainsaw sharpener allows beginners and professionals alike to sharpen even the dullest chainsaws in minutes with ease. Ergonomic design and chain angle guide keeps the angle in place while sharpening, either using the right or left hand. Keeping oil in the chain and rails to reduce friction and extend life. EXTENDS THE LIFE OF YOUR CHAINSAW: This chainsaw sharpener offers a quick and easy way to sharpen the chain. A dull chain causes the chainsaw user to lean over the tool and squeeze the wood to cut it more firmly, this is unsafe and may cause an accident. The chainsaw sharpener allows you to sharpen your chain in a few passes. SHARPENED AT THE SAME ANGLE AND AT THE SAME DEPTH: It is really important to sharpen all chain teeth equally. This is difficult to achieve when sharpening your chains with a file. With this chain saw sharpener, all you have to do is set the grinding angle and you can easily power through the chain knowing that every tooth will be sharpened to precisely the same angle and depth for a clean finish every time. > QUALITY AND UNIVERSAL PRODUCT: Our chain sharpener is made of stainless steel and high quality ABS. This chain sharpener is installed on a grinder and can therefore have an adjustable speed, lo allows a clean and precise finish on each tooth of the chain. Number of parts delivered: 1 set Size: 7cm Note: The data is manual measurement, please allow 1-117cm error, due to differences between light and screen, there will be a certain color difference , the specific received in kind shall prevail.