Dewalt DCK290L2R 20-volt MAX Li-Ion 3.0 Ah Hammer Drill and Impact Driver Combo Kit (Certified Refurbished) 20V Max lithium ion batteries offer longer tool run time and enhanced durability 3-speed all-metal transmission matches the tool to task for fast application speed Impact driver has a compact (5.55 inch front to back), lightweight (2.8 pounds), design to fit into tight areas Three LED lights with 20 second delay after trigger release provide visibility without shadows