The Tri-Stone Benchstone is the most versatile 3 Stone Sharpener available, harnessing the best of 3 worlds: Diamond, Alumina-Oxide and Ceramic. The full diamond surface is the fastest way to reset an edge. The long lasting Alumina-Oxide and Ceramic surfaces are used for sharpening and finishing. The result is a standalone sharpening center that will do it all, with better versatility than other similar products and last longer doing it. All sharpening surfaces measure 2" x 6". The sturdy plastic base boasts a wide footprint with low-profile and non-slip rubber feet giving the Lansky Tri-Stone Benchstone greater stability, resulting in greater user satisfaction. Screw holes included in base for easy bench mounting.