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Diamond Products’ Core Bore CB500-HH hand held core drill motor is a heavy duty core drill available at a light duty price that is ideal for drilling small diameter holes up to 3 inches in diameter. The 1300 watt, 115 volt electric motor with slip clutch works as a hand held or in tandem with the company’s M-4 rig stand. It features a 2-speed gear box (1100 rpm and 2200 rpm) and comes with a molded carrying case, water connection for wet drilling, shoulder brace for increased stability and 5/8-11 threaded spindle and 5/8-11 to 1.250-7 adapter.