The Kasumi Combination Whetstone is a versatile sharpening tool that is perfect for maintaining the sharpness of your knives. It features a combination of rough and medium grit ceramic stones, allowing you to effectively sharpen and refine the edges of your blades. The stones are designed to be used with water, ensuring a smooth and efficient sharpening process. The rubber base provides stability and prevents slipping during use, making it safe and easy to use. With the Kasumi Combination Whetstone, you can keep your knives in optimal condition, ensuring they stay sharp and ready for all your culinary needs.