The SUNNEN Hone/Honing Stones Set, featuring high-quality JHU-525 aluminum stones specifically designed for use on your CNC mill, is an invaluable tool for any hobbyist or professional machinist. Each stone in this set is 220-grit, perfectly suited for a wide range of projects, from intricate carvings to simple finishing work. The JHU-525's durable aluminum construction ensures long-lasting performance and durability, reducing the likelihood of stone breakage or damage. By using these high-quality honing stones, you can improve the life of your CNC mill's spindles and bearings, while also enhancing the overall precision and performance of your machining tasks. With a commitment to superior quality and craftsmanship, SUNNEN has created a product that is as indispensable in the workshop as it is versatile in its applications.