The Makita HP1640 Percussion Drill is fitted with a 13mm Keyed Chuck. It has a variable speed trigger and forward/reverse rotation for increased control. The tool is double insulated for increased user safety. It is supplied with a side handle and a depth stop. Specification Input Power: 680W No Load Speed: 0-2,800/min. Impact Rate: 0-44,800/bpm Capacity: Masonry 16mm, Steel 13mm, Wood 30mm Weight: 2.0kg Vibration Hammer Drilling: 19 m/sec² Vibration K Factor: 2 m/sec² Noise Sound Power: 103 dB(A) Noise Sound Pressure: 92 dB(A) Noise K Factor: 3 dB(A)