Black & Decker BDCDD18N-XJ. Idle speed (max): 650 RPM, Drilling diameter in wood (max): 2.5 cm, Drilling diameter in steel (max): 1 cm. Power source: Battery, Battery technology: Lithium-Ion (Li-Ion), Battery voltage: 18 V. Vibration emission: 0.8 m/s². Quantity per pack: 1 pc(s)