Suitable Size: 8 inches in diameter, 1 inch wide, bore 5/8 inches, 600 grit. Stainless steel body, smooth surface, does not rust, high hardness, high compressive strength, good wear resistance and long service life. High Performance: Electroplated diamond flat grinding wheels are designed for grinding and cylindrical grinding of hard alloy measuring tools, tungsten steel, high-speed steel, alloy steel, glass, gemstones, jade, magnetic materials, ceramics, molds and other hard materials. New Upgrade: Compared with traditional diamond grinding wheels, the CBN grinding wheel generates less heat and is more suitable for hard alloys, high alumina porcelain, optical glass, semiconductors, stone and similar materials. More Professional: Designed for precise grinding on common grinders. Recommended operating speed: 1000 RPM to 3600 RPM. CBN abrasive offers high compressive strength, low heat generation, excellent shape retention and extended service life. Perfect Compatibility: Precision manufactured for exact fit, eliminating the need for truing or dressing. Optimizes performance of entry-level grinders to approach industrial standards. Aluminum arbor reducing bushing provides smoother operation compared to plastic versions. Ideal for high-speed steel product grinding. Type: 600 Grit Color: Silver Material: Steel Size: 20.3 x 20.3 x 2.5 cm Package Contents: 1 x Diamond Wheel Note: Light reflection and display differences may cause slight variation in color. Measurement allowance: +/- 1-3 cm.