DEWALT DW236 7.8 Amp 1/2-Inch with Keyless Chuck All metal single-sleeve keyless chuck with spindle lock, carbide jaws and ratcheting action provides greater bit retention and tool-free convenience Helical-cut steel, heat-treated gears for increased durability and long gear life Metal gear housing for jobsite durability and increased reliability Rubber grip and two-finger trigger for increased comfort and greater control 360 degree side handle for greater control and versatility