The Cordless Chain And Blade Sharpener is designed for fast consistent chain and blade sharpening. The push button variable speed control allows you to adjust the speed to suit the application, providing added control and accuracy. With the chainsaw chain accessory, you can bring a sharp edge back to your chain to achieve optimal cutting performance. Alternatively, you can use the blade sharpening accessory to maintain a sharp edge on your tool blades, such as mower blades, garden shovels or shears. This product is intended for DIY use only.