The Porter-Cable 9977 14.4-Volt Cordless Hammer Drill kit with 1/2-inch keyless chuck is a compact hammer drill with outstanding power and torque. The 9977 can handle heavy jobs due to its 20-position clutch that lets you dial in the perfect torque level as high as 420 in./lbs. The dual-speed gearbox drives the clutch from 0-450 RPM in low and 0-1,400 RPM in high. The 9977 comes equipped with two rechargeable 2.0 amp-hour battery packs and an advanced diagnostic charger that monitors the batteries while being charged. This kit also comes with a carrying case with on-board storage for bits.