DESCRIPTION: Ideal for drilling in concrete and masonry from 4 to 28mm. Rotation stop for light chiseling work in masonry, stone and concrete. Tool-free interchangeable tool holder and 13mm keyless. Impact-stop for drilling in wood, steel, etc. Very high rate of penetration through optimally tuned electro-pneumatic hammer mill. Safety clutch for active protection of user and machine. Electronic speed and blow regulation. Ergonomic rubberized grip areas. Ergonomic rubberized auxiliary handle with light. Very long service life due to fully synchronized transmission. Maximum dust protection through an innovative sealing system. Extremely compact and robust construction. SPECIFICATIONS: Power Input: 900 Watts, No Load speed: 0-1450 U / min, Single blow energy (EPTA 05/2009): 3.0 Joule, Blows per minute: 0-5350 bpm, Bit retainer: SDS-plus, Max. Drilling capacity (wood): 30 mm, Max. Drilling capacity (metal): 13 mm, Max. Drilling capacity (concrete): 28 mm, Max. Drilling Capacity (Core Bit): 65 mm, Weight: 3.1 kg, Length: 360 mm, Height: 210 mm, Vibrations ? Drilling in concrete Hammer: 14.9 m/s?, Uncertainty K 1 (Vibration): 1.5 m/s?, Hand / Arm Vibration ? Chiseling: 13.8 m/s?, Uncertainty K 2 (Vibration): 1.5 m/s?, Vibrations ? Drilling in metal: <2.5 m/s?, Uncertainty K 3 (Vibration): 1.5 m/s?, Hand / arm vibration screws without knock function: <2.5 m/s?, Uncertainty K 4 (vibration): 1.5 m/s?, Sound pressure: 89 dB (A), Uncertainty K 1 (noise): 3.8 dB (A), Sound pressure: 100.1 dB (A), Uncertainty K 2 (noise): 3.8 dB (A)