Specifications: Max Drilling Diameter: 4". Rated Voltage: 110V. Rated Frequency: 50-60Hz. Rated Input Power: 1500W. Dual Speed: 2100rpm/950rpm. Arbor size is 1 1/4" 7UNC. Structure and Features: 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. This is a brand NEW 4" portable coring drill. It's a high quality unit with a duel speed function. ALSO COMES WITH 2 WET CORING BITS UP TO 4". LET US KNOW AFTER THE PURCHASE WHICH BITS YOU WOULD LIKE. BLUEROCK