DMT DMG Diafold Magna-Guide Sharpening Accessory Kit Superior diamond sharpening stones Legendary quality Made in the USA ABG: 7-Angle adjustability for a professional edge every time can be used for guided sharpening with any bench stone as well Works with Diafold Sharpeners Sharpens knives and tools faster than conventional stones with DMT's monocrystalline diamond surface No oil is needed-sharpen dry or with water Durable construction will provide years of consistent performance and reliable service