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【4-in-1 Design】Our CBN grinding wheel features a 1/4" radius on each edge, ideal for grinding hollowing tools, drill bits, scrapers and more. 【Accurate Size 】8" diameter, 1.25" width, 5/8" bore, 320 grit. The ultra-fine 320 grit ensures a smooth, refined finish and sharp, polished edges for high-precision tool sharpening. Precision-sized for a perfect fit on your bench grinder with zero wobble. Built with a rigid 6061 aluminum body. 【Cool Cut, No Metal Sticking】 Coated with high-grade CBN grains and fully nickel-plated for strong bonding and great shape retention. It resists grain shedding and metal sticking that causes harsh vibration. CBN grinds cool to avoid overheating and temper burn on HSS tools. It stays rigid after long use, so you don’t need to readjust your jig or dress the wheel. 【Fit Most Bench Grinders】Strictly balanced to eliminate vibration during use. Delivers precise grinding even on standard bench grinders. Recommended operating speed: 1000–3600 RPM. 【After-sales Guarantee】As a direct manufacturer of CBN grinding wheels, we offer reliable quality support. If you have any questions or quality issues with your CBN grinding wheel, please feel free to contact us for support.