Replacement Powersharp chain and sharpening stone from Oregon. The Powersharp system will eventually wear out with prolonged use and you will need to replace the chain and sharpening stone. The Powersharp cutting system has revolutionized the sharpening process for consumer chainsaws. This system allows you to sharpen your chain quickly and efficiently without ever filing. See video for more details. PowerSharp replacement chains will not work on conventional bars and must be matched up with a Powersharp system. This chain cannot be sharpened manually.