The Soft/Hard Arkansas Combo Stone is made from natural stone with a high content of microcrystalline quartz. Quarried in the Ouachita Mountains of Arkansas and Oklahoma, it makes a great surface for sharpening knives and tools.The Soft/Hard Arkansas Combination Stone gives you a medium and a fine grit. This combination offers you an economical combination grit stone. When paired with a coarser India stone, this combo stone will give you a good value for sharpening knifes and tools.The handsome wooden box keeps the stone safe when not in use. If you do a lot of sharpening, you’ll appreciate the large 8″ x 2″ x 1″ stone; its generous size allows for longer strokes to speed up the sharpening process.