BOSCH Standard for Universal Diamond Cutting Disc Cut off Wheel Bosch AccessoriesIdeal for general construction materials such as concrete, masonry, brick, granite, cast iron pipe, and occasionally other metals Sintered cutting rim Universal for use with a variety of materials Appropriate for hand held angle grinders Maximum circumferential speed 80 m s (depending on rpm and disc diameter) Laser welded diamond cutting segments Bore diameter: 22. 23 mm