Makita LXRH01Z 18-Volt LXT Lithium-Ion Brushless Cordless 1-Inch Rotary Hammer (Tool Only, No Battery) Efficient BL Brushless motor is electronically controlled to optimize battery energy use for up to 50-Percent longer run time per charge The BL Brushless Motor eliminates carbon brushes, enabling the BL Motor to run cooler and more efficiently for longer life Compact design at only 12-7/8 long weighs only 102-Pound Torque Limiting Clutch prevents gear damage by automatically disengaging gears if the bit binds Sequential Impact Timing provides timed hammering during rotation to minimize overlapping bit impacts resulting in up to 50-Percent faster drilling