Lansky Sharpeners Diamond Benchstones Fine The Lansky controlled-angle knife sharpening System is an easy-to-use sharpening solution that helps you get a Razor sharp edge every time The controlled-angle sharpening System was designed by arthur Lansky levine in 1979 A first of its kind, the knife sharpening System was a hit with consumers, and remains our most popular item Choose from various sharpening abrasives including: alumina oxide, diamond, tungsten carbide, ceramic, and natural Arkansas