The adjustable angle pull-thru knife sharpener offers new, innovative features never used on a manual knife sharpener and functional performance unmatched by standard edge maintenance products. This sharpener offers two stages of sharpening (coarse and fine) for all types of straight edge knives with a grind on both sides of the blade and a fixed-angle slot for sharpening serrated edge blades. It will sharpen a wide variety of knives by simply adjusting the angle of the abrasive components to match the angle of the original factory grind. Just turn the dial to one of the 6 angles offered, then pull your knife through the appropriate slots.