The Makita HR1841F SDS Plus Rotary Hammer with Anti-Vibration Technology The Makita HR1841F SDS+ Rotary Hammer features Anti-Vibration Technology which reduces the overall vibration of the tool without adding to the weight. Features: LED job light Torque limiter Lock-on button Double insulation Variable speed trigger Forward / reverse rotation Anti-Vibration Technology Adapted for SDS-PLUS bits Rotary Only / Rotary Hammer modes One-touch sliding chuck for easy bit change Specification: Net Weight: 2.0 kg Impact Energy: 1.4 J Input Wattage: 470 W Capacity in Steel: 13mm Sound K Factor: 3 dB(A) Capacity in Wood: 24mm Sound Pressure: 87 dB(A) Vibration K Factor: 1.5 m/s_ Sound Power Level: 98 dB(A) (Drilling into metal): 3.0 m/s_ No Load Speed: 0 -2,100 rpm Blows per Minute: 0 -4,800 bpm Max in Concrete (TCT bit): 18mm Max in Concrete (TCT Core): 35mm Max in Concrete (Diamond Core): 65mm (Hammer drilling into concrete): 7.5 m/s_