Delivers Up To 50% More Power and Performance than Previous Model.BL Brushless Motor delivers 1,090 in.lbs. of Max Torque.0-31,500 BPM for fast hammer drilling in masonry materials.Efficient BL Brushless motor is electronically controlled to optimize battery energy use for up to 50% 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.