Idle speed: 0 8000 rpm 0 11000 rpm 0 16000 rpm. Drilling tension diameter: 1-10 mm. DescriptionInput power: 340W Drilling diameter: 1mm-10mm Voltage, frequency: 220 V, 50 Hz Idle speed: 0 8000 rpm 0 11000 rpm 0 16000 rpm Drilling tension diameter: 1-10 mm Maximum spindle travel: 25mm Accessories include: 1 handle 1 Chuck Key 1 2.5 # Allen key 1 4 # Allen key.