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 have strong corrosion resistance, strong pressure resistance and durability.Easy to Install: It is as easy to use as a pencil sharpener; simply place the clamp on the rod, position the ratchet on the tooth, insert the reamer into the guide sleeve and turn the handle.Portable: The hand crank chainsaw sharpeners are convenient for outdoor use and have reinforced safety that can protect your hands from injury.Precise Maintenance: Every time you sharpen a tooth, all you have to do is pull the chain. Accurate sharpening can ensure that every tooth is repaired! Accurate positioning: The ratchet serves as a stop to ensure accurate and repeatable tooth positioning. Perfect design: To adapt to different types of chains with different holes, the chain saw sharpeners are equipped with 2 holes for fixed sharpening, one hole is fixed and the other moves back and forth, very flexible. Product size: 9.8 x 6.5 x 7.5 cm. Delivery quantity: 1 piece,"