The Makita HP1640 Percussion Drill has the following features ;- Forward/reverse rotation.- Variable speed trigger.- Double insulated. Technical Specifications: Blows per minute: 0-44,800 bpm.No load speed: 0 - 2,800 rpm.Vibration hammer drilling: 19 m/sec².Vibration K factor: 2 m/sec².Input wattage: 680 w.Noise sound power: 103 dB(A).Noise sound pressure: 92 dB(A).Noise K factor: 3 dB(A).Net weight: 2.0 kg.Max in masonry: 16 mm.Max in steel: 13 mm.Max in wood: 30 mm.Supplied with side handle and depth stop