The AccuSharp 3-Stone Kit is equipped with six angle guides and three sharpening options to keep your knife's edge razor sharp with fine, medium, and coarse alumina-oxide stones. Angle guide has settings for 11 degree, 15 degree, 18 degree, 21 degree, 25 degree, and 30 degree angles. Features: Multiple angle settings Includes (3) stones to keep your knife razor sharp