The DeWalt DC900 is a Factory Reconditioned Heavy-Duty 1/2" 36V Cordless Hammerdrill/Drill/Driver Tool Only. It is designed with a patented three-speed transmission that optimizes the speed applied to each application. The first speed is ideal for use with hole saws and self feed bits when drilling large holes in wood. The second speed is designed for use with auger bits or screwdriving and the third speed is meant for hammer drilling into concrete. Additionally, it is equipped with a 0.5" self-tightening chuck that automatically tightens throughout operation. No additional includes.