Suitable Size: 8 inches in diameter, 1 inch wide, bore 5/8 inches, 180 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 similar materials. New Upgrade: Compared with traditional diamond grinding wheels, CBN grinding wheels generate less heat and are more suitable for hard alloys, high alumina porcelain, optical glass, semiconductors, stone, and other demanding applications. More Professional: Ideal for precise grinding on common grinders. Recommended operating speed: 1000 RPM to 3600 RPM. CBN offers high compressive strength, low heat generation, excellent abrasive retention, and extended service life. Perfect Compatibility: Precision manufactured for accurate fit, eliminating the need for truing or dressing. Optimizes performance on entry-level grinders, delivering industrial-like results. Aluminum arbor reducing bushing provides superior smoothness compared to plastic versions. Suitable for high-speed steel product grinding. Type: 180 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 color variation between the image and actual item. Measurement allows for an error of +/- 1-3 cm.