The oregon powersharp bar is an easy to use precision sharpening system that allows chainsaw users to sharpen blunted chains in a matter of seconds simple to fit and easy to use the powersharp bar attachments sharpens chains in 3 to 5 seconds up to 10 on electric models and it does so while the chain is still mounted on the saw meaning it doesn39t need to be removed which in turn allows you to focus more time and effort of cutting rather than sharpening please note the sharpening st