Thank you for viewing. This is the Olfa Kannon Ekuho Black. As shown in the second photo, there is some peeling of the coating on the upper surface. Please be aware of this. The back side is in relatively clean condition. This is a ceramic grip stone sold by Olfa, famous for its cutters, about 30 years ago. [Relaxation Effect] Designed to promote relaxation. The characters "Kannon Ekuho" are engraved on it, and it is said to dispel tension and stress, soothing the mind and bringing a relaxing effect.