At Last An Ultra-Durable 4-Speed Core Drill System with Rpm Range That Makes in the Industry''s Most Versatile Coring Tool. It''s Capable of Accommodating All Popular Core Bit Sizes: Small, Intermediate and Large. 3-Hp Motor 110V with Large Super-Duty Gears and Clutch Assembly Assured Maximum Output and Durability. Carrying Handle for Portability Makes It Complete. It is "user Friendly" Surpassing the Rugged Standards That Are Demanded by Professionals in the Concrete Cutting Industry. New ... Single-Shift Lever That Has Been Incorporated into the New 4-Speed Core Drill. The Side Plate is Marked for the Four Different Shaft Speeds. This New Lever Makes It Easy to Select the Proper Shaft Speed. The Gearbox Shifting out of Gear While Drilling. Includes: MECO 4-Speed Core Drill MECO Roller Carriage MECO Column Base 3" X 36" Precision-Machined Column.