A chainsaw is only as useful as its chain is sharp; however, keeping the business end in good working order can be a challenge. On the surface, sharpening a chain looks complicated. The teeth are angled in two directions with multiple cutting edges on different planes, one requiring a round file and the other a flat file to properly hone. But like most things, sharpening a chainsaw can be as difficult or as easy as one chooses to make it. Instead of running to the hardware store for a new blade every time yours gets dull, or paying to have it brought back to life, consider investing in one of these proven tools for always keeping your chain in perfect cutting shape.