Model DCK2100P2. Dewalt 20V MAX Brushless Lithium-Ion 1/2 in. Impact Driver Combo Kit with 2 Batteries (5 Ah). Both tools compatible with all DEWALT 20V MAX and FLEXVOLT Batteries. 20V MAX 1/2 in. 20x brighter LED: The DCD999 3-mode LED provides lighting in dark or confined spaces up to 20x brighter than the DEWALT DCD985.