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/sec Vibration K Factor 2 m/sec Noise Sound Power 103 dB(A) Noise Sound Pressure 92 dB(A) Noise K Factor 3 dB(A) 1 x Makita HP1640 Percussion Drill 13mm Keyed Chuck 680W 110V Version.