Spyderco Profile CBN 8in Stone W/pouch Brown. Their unique design provides multiple abrasive surfaces and shapes to efficiently sharpen knives with all different blade shapes and both plain and serrated edges. Their carefully radiused convex surfaces sharpen gouges and other woodworking tools while their longitudinal grooves make quick work of awls scribes and other pointed tools. Even better their advanced abrasives also do not require any oil or water during use. Sold individually or in a set of three all come complete with protective suede pouches that also serve as non-slip pads during use. Specifications for Spyderco Profile Stone Knife Sharpening Stones: Manufacturer: Spyderco Fabric/Material: Ceramic Length: 8 in Package Contents: Spyderco Profile Stone Knife Sharpening Stones Pouch