Ceramic grain ¬∑ can be used for chrome and chrome-nickel steel, high-alloy steel, nickel-based alloys, titanium alloys, brass, bronze and structural steel ¬∑ aggressive and cool grinding with a long service life ¬∑ when grinding there is a pronounced self-sharpening effect, so that a high and even material removal can be achieved at high processing speeds, with star hole ¬∑ Color red ¬∑ Bore 22.23 mm Ø ¬∑ for use with backing pad item no. 40 00 841 683, 40 00 841 684, 40 00 841 685, 40 00 841 686, 40 00 841 687, 40 00 841 688 ¬∑ Other technical characteristics Bore: 22mm ‚Ä¢ max. speed: 12000min-¬π