11-306 Ideal for sharpening Quarter Moon Knives and other tools because of its large flat surface. Use with water instead of oil. Will maintain its flat surface for years of service. 2 1/2″ x 6″ comes in wooden box.11-306理想磨半月刀和其他工具因為它的大平。使用水不是油。將保持多年的服務其平。2 1 / 2“×6”來木箱。