600 RPM Diamond Coring Motor with Clutch 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 300 rpm or 600 rpm operating speed. The 4004 has a clutch to protect gears and motor against overload. This unit will handle core bits from 4" to 14" in diameter. Includes motor, built-in water swivel, adapter to receive standard water hose, water control valve and wrench. Features: Two Speeds 20 AMP Motor Clutch Protection Built-In Water Swivel 300 RPM 7 to 14 Coring Bits Capacity 600 RPM 4 to 7 Coring Bits Capacity 120 AC Volts 4.8 Horse Power 5 Year Warranty Since its founding in 1924, Milwaukee has focused on a single vision: To produce the best heavy-duty electric power tools and accessories available to the professional user. Today, the Milwaukee name stands for the highest quality, durable and reliable professional tools money can buy.