Chainsaw chain grinding devices help keep your chainsaw sharp, improve performance, and extend the life of your chainsaw. Easy to use: The jig is as simple to operate as a pencil sharpener. Just clamp the jig onto the shank, position the ratchet over the tooth, insert the bit into the guide sleeve, and turn the handle. Versatile: Easily sharpen each tooth by advancing the chain, ensuring consistent and accurate results. This chainsaw chain sharpener is ideal for anyone who owns a chainsaw, helping restore the chain to optimal sharpness. Precision Polishing: Compatible with most chainsaws, the ratchet mechanism ensures accurate and repeatable tooth positioning for uniform sharpening. Best Choice: Portable and convenient, it features a removable crank and a set of guide sleeves, making it suitable for use with various chainsaw chains.