A professional dual grit puck whetstone made with premium quality American sapphire ceramic. it provides an exceptionally sharp blade with minimal effort. Ideal for axe, hatchet, knife, tomahawk, shovel, chisels, scythes, spade and other blades that requires razor sharp edges. The grey medium face will rapidly erase scratch marks from a file, while the fine side will bring the edge to a hazy mirror finish that easily shaves. Readily absorbs and retains water, with a thin film on the surface to keep the pores of the stone free of metal fines. EASY TO USE: Hold the stone firmly in your hand without exposing any fingers around the sharpening edge. Use either small circular motion or sweeping motions along the length of blade while counting the number used. Work on one side of tools edge before moving to the other side. The Ergonomic Design of the sharpening stone makes it easy to grip and allows for a safe easy sharpening experience PRO TIP: A major reason for the industry-wide popularity of our pucks is specifically because they are not too coarse. That work is better performed by a file, and the WOOX stone was designed for working in tandem with one to first set the geometry with the file and then rapidly hone it to a fine edge.