Max Drilling Diameter: 4″. Rated Voltage: 110V. Rated Frequency: 50-60Hz. Rated Input Power: 1500W. Dual Speed: 2100rpm/950rpm. Two-gear rotary speed is designed for drilling different size holes. Top gear is for smaller drill bits 1″-2″. Bottom gear is for larger drill bits 2″-4″. The drill is fitted with a safety clutch. This unit is designed to be an easy portable type drill for easy hand drilling. Adaptable water spigot for “wet” drilling. Drill color is red. Comes with a durable carrying case. Level on side of the drill for precision drilling. Automatic hold down switch for comfort. Collar size is 2 23/64″. NOTE: Drill bit pictured is not included.