Stone Boss Supreme Wet/Dry Bits for High-Production Drilling of Granite, Marble and Similar Materials, Sizes 1/2" thru 4" with 5/8"-11 Threaded Arbor

Premium quality for fast penetration speeds with long life on granite, marble, engineered stone, onyx, terrazzo, masonry, concrete, and all similar materials. Features strong laser-welded segments with heat-treated steel cores designed to withstand the demands of dry drilling. May be used for wet or dry drilling. Use with low-speed drills or variable-speed grinders and polishers (500-2,500 RPM). Features 5/8"-11 threaded arbor with wrench flats for easy on/easy off operation.