Chainsaw chain grinding devices help keep your chainsaw sharp, improve performance, and extend the life of your chainsaw. 【Easy to use】: The jig works similarly to a pencil sharpener; simply clamp the jig onto the shank, position the ratchet over the tooth, insert the bit into the guide sleeve, and turn the handle. 【Versatile】: Move the chain as needed to access each tooth for precise sharpening, ensuring even wear and consistent results. Ideal for anyone who owns a chainsaw. 【Precision Polishing】: Compatible with most chainsaws. The ratchet mechanism ensures accurate and repeatable tooth positioning for uniform sharpening. 【Best Choice】: Portable design with a removable crank and a set of guide sleeves, suitable for use with various chainsaw chain types.