Wusthof Diamond Sharpener, Regular, Oval, 26 cm (10-inch) - 4481

Another very high quality diamond sharpener. This one is coated with industrial diamonds in a "regular" grade, so it's good to use as a first stage (before using a fine model, or before a final honing step), or if you have a seriously damaged or dull blade. It'll take off more metal than the "fine" model 4483, but in my opinion it's not really a huge difference between the two.  Note: this does not normally replace a traditional steel, which is more for maintaining and edge, whereas a diamond sharpener actually removes more metal for restoring a dull edge that a steel isn't helping anymore.