Double-sided oilstone for grinding and finishing: one side is #3000 grit ruby oilstone, the other side is #10000 grit natural agate oilstone. It is ideal for grinding and fine grinding of various tools, including steel, alloy steel, and precision measuring tools and instrument parts. Materials and construction: The stone is sintered at high temperatures to deliver high hardness and strength. The ruby oilstone is rose red with a fine, compact structure, offering wear resistance and high hardness. The natural agate oilstone has a very fine and even texture, strong hardness, and great wear resistance. Easy to use: For wet operation, apply a few drops of water to the blade. The raised edge provides precise and refined finishing of your tools. Applications and performance: Widely used in the jade instrument industry for precision parts, gemstones, measuring tools, tools, instruments, hard alloys, and more. Specifically designed for fine polishing and achieving a high level of finish on various materials. Use scenarios: - Sharpening and finishing edges on steel and alloy steel tools, including precision measuring tools. - Finishing gemstone facets, jade instruments, and other hard materials requiring a high-quality finish. - Reconditioning hard alloy components and precision instrument parts that demand wear resistance.