Accusharp, Gardensharp, Tool Sharpener, Designed To Sharpen Single Edged, Hard To Sharpen Items Lawnmower Blades, Pruning Shears, Limb Loppers, Hoes, Shovels & Scythes, All Can Be Sharpened To A Razor Edge Quickly & Easily, The Full Length Finger Guard Protects Fingers While The Reversible Diamond Hone Tungsten Carbide Blades Puts Your Cutting Edge In Good As New Condition, Will Not Rust & Can Be Cleaned With Soap & Water Or In The Dishwasher.