The ceramic sharpening steels are made of high-grade fine ceramic with very fine abrasive surface. Part of the stick is also grooved. This not only makes the stick more versatile - The fine grain size allows for extremely smooth surfaces and sharp edges. They are suitable for both rough and fine sharpening. They can do a quick and good job. A great kitchen tool. We offer wide and finest range of advance ceramic knives and kitchen accessories: knives, scissors, mills, tweezers, sharpeners, screwdrivers, metal-forming tools, Ceramic Battery-Fill Tool, rings, seals and valves, ball valves, bed knife, loom cutter, plungers...we produce also wide range of ceramic/diamond sharpeners. Zirconia was considered the wonder ceramic in many industries. Today we have elevated the standards of Zirconia to ultra-high hardness without the brittleness.