The Accusharp sharpens machetes, axes, hunting and pocket knives and other cutting tools. It utilizes tungsten carbide sharpeners (blades) that are both reversible, for double life, and replaceable to keep a razor sharp edge. Exrta blades are also available for the Accusharp only. The NEW Shear Sharp sharpens scissors, shears, tin snips, hedge clippers and similar tools. The shear sharp not shown looks like the Accusharp but has only one blade which can be reversed when needed but is not replaceable. Detailed instructions and warranty are included.