This drill features the Exclusive Shift Lock Drive System, which quickly locks out the clutch when shifting from "driver" to "drill" mode for superior drilling power. Thanks to Makita"s All Metal Gear Transmission, this drill also provides smooth, efficient power transfer for the most demanding jobs. Externally Accessible Brushes make for quicker maintenance and longer tool life. The Maximum Performance Two-Piece D-31 Motor delivers power, efficiency and serviceability in a more compact size. Latch on to the Ergonomically Designed Rubberized Grip for superior comfort and control. This drill also features a variable speed trigger for precise operator control, a Large Spindle Bearing to ensure positive, on-center drilling performance, and a Locking Ratcheting Chuck for secure tightening of bits and unmatched grip strength. Power up your drill with a couple of 2.6Ah Ni-MH battery nickel-metal hydride batteries (included) for greater capacity and longer run time.