The Makita HP1641 Percussion Drill has a dual purpose for Rotation only and Rotation with Hammering (with keyless drill chuck). The new reversing system allows extended service life of carbon brush no power reduction even in reverse rotation. Variable speed control via a larger trigger gives the user more control. An in-line positive grip design maximises power thrust. Specification Input Power 680W No Load Speed 0-2,800/min. Impact Rate 0-44,800/bpm Capacity Steel 13mm, Masonry 16mm, Wood 30mm Weight 2.0kg All vibration figures quoted are Tri-axial to EN 60745 2006. Vibration Drilling 2 m/sec Vibration Hammer Drilling 19 m/sec Vibration K Factor 2 m/sec Makita HP1641 Percussion Drill Keyless Chuck 680W 240V version.