A set of natural whetstones from Kyoto, consisting of soft, medium-hard, and hard stones. A soft whetstone of the red pin type. A medium-hard Suita stone with some lotus flower patterns. A slightly harder Ao-Suita stone. Please take a good look at the images for the size. Some areas of the whetstone surfaces are rough. I think you can sharpen chisels, small planes, and small blades without any problems. Because of their irregular shapes, they have been secured to wooden boards with protective measures.