DMT DMGEF Diafold Magna-Guide Sharpening System Blade guide 7-Angle adjustability for a professional edge every time Portable two sided sharpening in extra-fine and fine diamond fold and go handles protect Sharpens knives 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 Product handle color may varify from the pictured product - still the same high quality USA product Blade guide 7-Angle adjustability for a professional edge every time and can be used for guided sharpening with any bench stone as well Portable two sided sharpening in extra-fine and fine diamond with convenient fold and go handles to protect the diamond whetstone when not in use Sharpens knives 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