Professional Grade Tungsten Carbide Knife Sharpener with Suction Cup and Unibody Design Guide system sharpens a variety of blades, including serrated edges Produces even and straight edges with precise angles Useable on kitchen knives, gardening shears, lawnmower blades, and more Removes only tiny amounts of metal, extending your knifes life Suction capacity of 12 kg keeps the sharpener securely anchored for one-hand operation