This 'next generation' twin-pack combines two fantastic DeWalt power tools with new, more compact battery technology The 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 is a bare tool twin pack - no batteries or chargers supplied. These machines have been designed with Powerstack batteries in mind but are fully compatible with all Dewalt 18v XR Batteries DCD999NT .