The DeWalt DC988IA is a Heavy-Duty XRP 18V Cordless Hammerdrill / Impact Driver Combo Kit with Contractor Bag. The 18V hammer drill and impact driver team up in this combo kit to take on the toughest demolition and fastening work. The 18V cordless hammer drill cranks out a whopping 500 in-lbs of torque for drilling and chipping through hard materials like butter. A 1/2 inch all metal, ratcheting chuck with carbide jaws prevents bit slippage. Equipped with a patented 3-speed transmission, its easy to adjust the tool speed to the task at hand, whether its a minute touchup or massive material removal. At 34000 BPM, this 18V tool makes quick work of the meanest masonry jobs.