The Lansky Controlled-Angle Sharpening System allows users to select the sharpening angles that are best suited for their knife's intended use. The knife clamp included in the sharpening system holds the knife steady, and holds the angle guide static and firm, so that the user can achieve the desired angle with every stroke of the sharpener. The Extra-Coarse to Ultra-Fine hones provide an excellent range of grits for complete edge care and maintenance. 5 stones, extra coarse, coarse, medium, fine and extra fine are included in this set. Made in USA.