DEWALT DW246 7.8 Amp 1/2-Inch Drill with Keyless Chuck Single-sleeve keyless chuck with spindle lock provides greater bit retention and tool-free convenience Triple gear reduction provides increased torque and reduces gear stress Rubber grip and two-finger trigger for increased comfort and greater control Metal gear housing for jobsite durability and increased reliability Helical-cut steel, heat-treated steel gears for long life and durability 360 degree side handle for greater control and versatility