[Chainsaw Sharpener]: We improved the hand crank of the chain saw chain shaperener so that the burr can be moved to a fixed position on the crank arm,so that the burr can fully use its grinding ,and at the same time the length of the burr socket is shortened so that each grinding head is not wasted and the life of the grinding head is extended. [More Handle]: We improved the hardle of the chain saw sharpeners hand crank, and added a nut spacer, the handle has become more and non-breakable, greatly extending the service life of the handle [Upgraded Chainsaw Sharpener tool ]: This upgraded chainsaw sharpener tool has a removable guide slot that can be switched on both sides,Suitable for All Kinds of Chain Saws and Electric Saws,It is a chain saw maintenance tool provided by lumberjacks and ,It is very easy to use, you can refer to our demo video in section that. [High Quality ]: Chain saw shaperner made of rust-proof, high hardness stainless steel alloy material and very strong, every time you grind a tooth, you only need to pull the chain. This ensures that every tooth is repaired! [Safe and Portable Chainsaw Sharpener Jig]: This manual chainsaw sharpener size is small,light weight,, Weight: 0.82452885988 Pounds, Manufacturer: Jaywool