Diamond coring motors are used with Vac-U-Rig and Dymorig diamond core rigs to drill holes into reinforced concrete. This 20 amp model features 4.8 peak horsepower with a 450 rpm or 900 rpm operating speed. The 4096 has a clutch to protect gears and motor against overload. This unit will handle core bits from 2 in. to 10 in. in diameter. Includes motor, built-in water swivel, adapter to receive standard water hose, water control valve and wrench. Two speeds: 450 and 900 rpm 20 amp motor Clutch protection protects gears and motor Built-in water swivel