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/sec² Vibration Hammer Drilling: 19 m/sec² Vibration K Factor: 2 m/sec²