The Kramer 6 Piece Sharpening Kit is a one-stop tool for getting even the dullest of knives scary sharp once again. It includes 400, 1000, and 5000 grit stones. Zwilling J.A. Henckels teamed up with Bob Kramer and built the Kramer line of knives, some of the finest kitchen knives on the market. Each one is built with supreme craftsmanship and utilitarian design. The Kramer line is easily recognizable by the iconic Kramer three-circle mosaic pin in the handle of each knife.