Bosch AdvancedImpact 18, Pistol grip drill, Keyless, Brushless, Black, Green, 0.512" (1.3 cm), 1500 RPM Bosch AdvancedImpact 18. Product design: Pistol grip drill, Chuck type: Keyless, Motor type: Brushless. Chuck capacity (max): 0.512" (1.3 cm), Idle speed (max): 1500 RPM, Drilling diameter in wood (max): 1.38" (3.5 cm). Power source: Battery, Battery capacity: 2.5 Ah, Battery voltage: 18 V. Weight: 2.43 lbs (1.1 kg). Number of batteries included: 2 pc(s)