Product DescriptionTake your sharpening stone anywhere with ease using this Trend precision, handmade diamond slip stone that is only the size of a credit card. The double-sided sharpening "card" includes both fine and coarse surfaces so that you can hone your tools and knives to your liking. Complete with storage wallet. Industrial monocrystalline diamond is electroplated in nickel onto a steel base to provide this sharpening tool with longevity, whether you use it for woodworking, engineering, gardening, outdoor pursuits, catering and domestic sharpening.From the ManufacturerA double sided credit card size slip stone for woodworking, engineering, gardening, outdoor pursuits, catering and domestic sharpening. Industrial monocrystalline diamond is electroplated in nickel onto a steel base for longevity