Smith’s Tri-Hone 3-Stone Sharpening System, Dimensions: 6 in L x 1-5/8 in W, 3/8 in Overall Height, Suitable for: All Types of Knives and Woodworking Tools3-stones mounted on rotating molded plastic triangle for easy stone rotation and identificationMolded plastic base with nonskid rubber feet for safetyV trough to catch the solutionPremium honing solution cleans and protects the sharpening surfaceSharpening angle guide ensures correct angle every time