Water Cooled Electric Drill for Air Conditioner and Range Hood Hole Making Product Features 1,600-watt high-power motor for powerful and efficient drilling; dual safety protection; waterless seal design; stepless speed control switch; and optimal weight distribution for greater comfort during use. Specifications Rated Voltage: 220 V, 50 Hz Rated Power: 1,600 watts Rated Speed: 0–2,100 rpm Hole Drilling in Brick Walls: Φ20–110 mm Hole Drilling in Load-Bearing Walls: Φ20–63 mm Total Weight: 4.1 kg