Use the Sportsman Earth Series Mini Electric Portable Chain Saw Sharpener to keep your chain saw sharpened. Great to keep in your tool bag, the Electric Chain File is perfect for touch-ups and honing while on the job. Running off the 12 volt DC power of your vehicles battery, the Mini Compact Sharpener lets you quickly and easily sharpen the chain on site. Measuring just 8″ long, this small but mighty hand-held Chain Saw File runs at 2500 RPMs and can accommodate most make and model chains.