Accusharp Diamond Rod AS. This Knife Sharpener from the folks at AccuSharp is a 4" closed unbreakable diamond-coated steel rod that's ideal for sharpening all knives. The retractable rod is engineered with a cone-shaped end for use on serrations and tight spaces and the diamond-coated steel rod has sharpening grooves for use with all kinds of hooks darts and pointed objects. Don't let any one know you have a knife without the Accusharp Diamond Rod. Specifications for Accusharp Diamond Rod Knife Sharpener: Manufacturer: AccuSharp Closed Length: 4 in Blade Material: Steel Features of Accusharp Diamond Rod Knife Sharpener: AccuSharp Diamond Rod Sharpener 4" closed Unbreakable diamond-coated steel rod Ideal for sharpening all knives The retractable rod is engineered with a cone-shaped end for use on serrations and tight spaces The diamond-coated steel rod also has sharpening grooves for use with all kinds of hooks darts and pointed objects Black pen shaped housing with stainless shirt pocket clip Hang packaged Package Contents: Accusharp Diamond Rod Accusharp AS030C: Diamond Rod