3 operation modes - hammering, hammering with rotation, rotation. Less bit wobbling. One-touch sliding chuck for easy bit change. Operation mode change lever positioned on the bottom of gear housing for reduced possibility of breakage. Quick change drill chuck from SDS-plus to 3 jaw chuck literally in a second Continuous rating Input : 800W No load speed : 0-1,200 Vibration Level : Hammer drilling: 15m/s? / Chiseling: 9,5m/s?;Drilling: 2,5m/s? Sound Pressure Level : 91dB(A) Sound Power Level : 102dB(A) Power supply cord : 2.5m (8.2ft) Capacity : Concrete : 26mm (1");Steel : 13mm (1/2");Wood : 32mm (1-1/4")