Quality materials: the chain sharpener is suitable for 12-20 inch chainsaws, the main body of the chainsaw chain sharpener is made of aluminum alloy and stainless steel, which has strong corrosion resistance, Strong Pressure Resistance And Durability.Easy To Install: It Is As Easy To Use As A Pencil Sharpener; Simply place the collet over the shank, position the ratchet over the tooth, insert the reamer into the guide sleeve and twist the handle.Portable: Hand Crank Chainsaw Sharpeners Are Convenient For Outdoor Use And Have Enhanced Safety Which Can Protect Your Hands From Injury.Precise Maintenance: Every time you sharpen a tooth, all you have to do is pull the chain. Precise Sharpening Can Ensure Every Tooth Is Repaired Precise positioning: The pawl serves as a stopper to ensure precise and repeatable positioning of the teeth.Perfect design: To adapt to different types of chains with different holes, the chainsaw sharpeners are equipped with 2 holes For fixed sharpening, one hole is fixed and the other moves back and forth, very flexible.