Core Bore Premium Black Dry Diamond Core Bit

Core Bore Premium Black Dry Diamond Core Bits Features Premium black grade dry bits feature wider segments than the heavy duty grade with a heavier core thickness They drill faster and last longer than any bit of its kind Drill dry through block, brick, and non-reinforced concrete Not recommended for concrete with reinforcement or hard materials Not all types of brick and block can be drilled - please consult factory 9" drilling depth, comes with standard 5/8"-11 threading and easily attach to most hand-held drills Jacobs Chuck Adapter available for hammer drills 5/8"-11 thread to straight shank Diameter Min Amps Max/Min RPM 1" (25mm) 6 6000/2300 1-1/4" (32mm) 6 6000/2300 1-1/2" (38mm) 6 6000/2300 1-3/4 (44mm) 7 5000/1600 2" (51mm) 7 5000/1200 2-1/4" (57mm) 7 5000/1200 2-1/2" (64mm) 7 5000/800 3" (76mm) 10 5000/800 3-1/2" (83mm) 10 5000/700 4" (102mm) 10 5000/700 4-1/2" (114mm) 10 5000/700 5" (127mm) 10 5000/700 6" (152mm) 10 2500/600