The Xtreme 317 Sportsman Diamond Hone Knife Sharpener from Chef'sChoice provides hairsplitting sharpness for virtually all your knives, even the heavier, thicker hunting, pocket, and tactical knives. The advanced knife guide system sharpens both straight edge and serrated blades, plus is completely safe for quality knives you may have. Its two stages combine the strength and durability of the double-bevel edge with a flawless, ultra-sharp edge. The Xtreme 217 Sportsman Sharpener consists of 100% diamond abrasives for sharpening and honing, guaranteed to never detemper. Advanced flexible stropping/polishing disks give you a super sharp, microscopically flawless polished edge. Ideal for sharpening double bevel and single bevel style knives. Two-year limited warranty. Made in the USA.