Lansky Sharpeners Arkansas Benchstone w/Walnut Base Mounted LBS6S Hard Arkansas benchstone is used when an exceptionally fine edge is desired. Provides the final polishing and finishing to all your edges. Soft Arkansas benchstone is the best quality natural stone to achieve a sharp edge quickly. It is ideal for chisels, planer blades, axes and other large tools, and is the most versatile for general purpose sharpening.