CHAINSAW SHARPENER SHARPENING KIT: Our chainsaw chain sharpener can be adapted to different types of chains. Our chainsaw sharpening kit contains a chainsaw angle guide, a key, a diamond grinding wheel in 4 sizes: 5/32 ", 3/16", 7/32" y 7/32" Which will help sharpen all existing chains. 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 angle guide of the chain hold the angle in place while sharpening, either using the right hand or the left hand. Keep 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, it is not safe and may cause an accident. The chainsaw sharpener allows you to sharpen your chain in a few passes. SHARPENED AT THE PRECISE SAME ANGLE AND DEPTH: It's really important to sharpen all teeth of the chain equally. This is difficult to achieve when sharpening your chains with a file. With this chain saw sharpener, just 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.