2200W Diamond Core Drill Concrete Drilling Machine Max? 180mm w/ Stand Press US Name: Drilling Machine Maximum Mrilling Diameter:? 180MM/7.1IN Voltage: 220V 50HZ Input Power: 2200W No-load speed: 1200r / min Water seal design: Copper Tube Advantage: The gear mechanical clutch is built into the gear box. When the high-speed rotating drill is locked, the gear and the motor are mechanically separated in time to ensure that the motor also prevents accidental damage to the user, greatly improving Quality and safety of the product. The motor has strong load capacity and high hole expansion efficiency. Domestic well-known brand switch, The electric wire guarantees the service life.