The DuoSharp Plus 8" double-sided 600/325 fine/coarse grit stone with base will sharpen, hone and lap, all types of woodworking tools including knives, chisels, plane blades, gouges, and carbide router bits. It also has a solid diamond coated area for sharpening small or pointed tools. This feature is like having a 6 honing stone and a sharpening card all in one stone. The stone measures 8" x 2-5/8". Use it dry or with water. It includes a non-skid mat to prevent slipping on work surface.