This 10 1/2" ceramic rod with hanging hook hardened to 81 rockwell and about 2,000 grit, with steel-reinforced core.
Similar to the European "steel", these rods are meant to hone; or gently realign your edge. These provide for a quick fix when using whetstones is not an option. The grooved ridges on two sides allow for more aggressive honing; great for any steel knives.