Includes coarse (120 grit), medium (280 grit), fine (600 grit) and ultra fine (1000 grit) hones along with a medium triangle shape hone for serrated knife sharpening. The Ultimate in Sharpening Systems Technology Safe, Easy and Convenient to use. The Lansky Controlled-Angle Sharpening System is designed to give your blade a professional, razor sharp edge every time. The Convertible Super C Clamp Mount has a unique two-piece design featuring aircraft grade aluminium construction that allows you to attach your Lansky Sharpening System on vertical, horizontal or curved surfaces. The patented Lansky Mounting System is the ideal accessory that will optimize your sharpening capabilities. The mounting system allows you the convenience of sharpening numerous knives or larger size blades easily.