Occasional saw chain users sometimes spend too much time using hand files to sharpen dull chain, or they lose an afternoon taking it to a dealer for professional sharpening. Fumbling an inexact sharpening is a thing of the past with PowerSharp. PowerSharp takes saw chain from dull to sharp in as little as 3 seconds. PowerSharp is also ideal for professional users who want greater productivity on the job. Professionals get precise and knife-sharp edges quickly and easily - every time.