This 'next generation' twin-pack combines two fantastic DeWalt power tools with new, more compact battery technologyThe DCD999 is a powerful brushless Combi Hammer Drill Driver. The DCF850 is a small and powerful impact driver ideal for automotive and industrial applications. It provides 205 Nm of torque in a compact body of just 100 mm. The DCF850 offers users enhanced control with a 3 mode switch, such as Precision Drive which ensures the material and fastener are not damaged during smaller jobs. The incorporated LED light improves visibility in difficult environments. This kit is supplied with two compact POWERSTACK batteries which provide 50% more power compared to the DCB183 battery, within a 25% smaller footprint than the DCB183a. Also included are a TSTAK .