Easy to use：The insulated plastic sleeve ensures safe operation, it can be easily screwed onto an electric grinder and can easily sharpen chains and serrated blades.Use with an electric grinder：This product is a grinding accessory electric that must be used with an electric grinder. Flexible operation, adjust the polishing angle. Your chainsaw will be sharp and will only take seconds. You can sharpen the chain quickly and easily without removing it.High hardness：Made of high-quality plastic and metal, the high-speed steel grinding heads feature high hardness, high wear resistance, toughness high heat and impact resistance, so you don't have to worry about damaging them. Convenient：This chainsaw sharpener is not only fast but also precise. This special kit is a quick and easy way to sharpen slow cut dull chainsaws, a simple guide to adjusting the sharpening angle for precision. Keeps the saw chain oiled for less friction and longer life.Function：Accessory guides provide the best sharpening angle. This special kit allows you to sharpen slow-cutting blunt chainsaws quickly and easily. Note: The data is all measured manually, please allow 1-3cm error, due to the difference in light and temperature. display, there will be a certain color difference, the actual object received shall prevail.