The Yaxell Reinforced Black Ceramic Sharpening Rod will quickly realign an edge and works well on harder Japanese steel knives which tend to have a higher Rockwell hardness. The medium 2000 grit surface polishes the edge smooth. Features a steel core with rubber in between to reinforce the rod, making this one of the most durable ceramic sharpening rods available. The tip features a rubberized plastic end-cap to absorb shock and to stabilize the rod against your cutting board while in use. The black ceramic material is a new type of ceramic that is much harder than traditional white ceramic. Use daily in a commercial restaurant environment or once every few weeks in the home to maintain a fine edge on your quality cutlery.