Color coded for your convenience with a non-slip, impact resistant mount! The sharpener has four sides with a different grit on each face, extra coarse (200 grit), coarse (300 grit), medium (400 grit), and fine (600 grit). Each side has layers of diamonds nickel bonded to the steel frame. The diamond sharpener fits into a non-slip impact resistant mount. If using the sharpener wet, use water or water-based honing oil rather than petroleum based oil. Use care to avoid excess pressure. All sides are 2" wide by 6" tall.