Makita 18V SDS drill with a brushless motor that delivers 0-680 RPM and 1.2 joules of impact energy The cordless DHR171Z brushless rotary hammer from Makita is ideal for working in tight spaces and overhead thanks to its compact design. It has an efficient brushless motor for up to 50% longer run time, increased power and speed and longer tool life. It has a 2-mode operation for \"rotation only\" or \"hammering with rotation\", with 0-680 RPM, 0-4,800 IPM and 1.2 Joules of impact energy for fast and efficient drilling. The compact size and lower weight mean reduced fatigue for operators, especially for overhead applications. Features:   Brushless motor delivers 0-680 RPM, 0-4,800 IPM and 1.2 Joules of impact energy for faster drilling  Compact and ergonomic design at only 273mm overall length  Weighs only 2.8kg with BL1840 or higher battery (battery not included) for reduced operator fatigue  Vibration absorbing handle moves independently of the motor and hammer mechanism for increased operator comfort  The electronically-controlled Brushless Motor efficiently uses energy to match torque and RPM to the changing demands of the application  An efficient brushless motor is electronically controlled to optimize battery energy use for up to 50% longer run time per charge  2-Mode operation for \"Rotation Only\" or \"Hammering with Rotation\" for multiple applications  Variable speed trigger enables the user to match the speed to the application for greater versatility  Built-in LED light illuminates the work area  One-touch sliding chuck for easy bit changes   Specification: Voltage: 18V Capacity in Concrete: 17mm  Capacity in Steel: 10mm  Capacity in Wood: 13mm  Impact Energy: 1.2 J  Shank: SDS+ PLUS  Impacts per Minute: 0 - 4,800 ipm  No Load Speed: 0 - 680 rpm  Weight (inc Battery): 2.8 kg  Noise Sound Pressure: 86 dB(A)  Noise Sound Power: 97 dB(A)  Noise K Factor: 3 dB(A)  Vibration K Factor: 1.5 m/sec_  Vibration: Hammer Drilling: 9.0 m/sec_  Vibration: Drilling into Metal: 2.5 m/sec_