M.POWER’S 5N1 Double-Sided Diamond File features Diamond Cross™ technology that combines an unparalleled abrasion rate, outstanding durability and ergonomics. The double-sided 300/600-grit stone is 1" wide by 5" long, making it useful for sharpening scissors, gardening shears and loppers, knives of all kinds, circular saw blades and lawn mower blades. It can be used indoors and outside without fear of corrosion, thanks to its stainless steel core. Comes with a clever grip handle and a Three-Year Guarantee from M.POWER.