Hitachi WH10DFL2 12-Volt Peak Cordless Lithium Ion Impact Driver Kit (Lifetime Tool Warranty) Covered by Hitachi's Lifetime Lithium Ion Tool Warranty & 2-Year Lithium Ion battery warranty Powered by Lithium Ion battery technology for fade-free power and lighter weight than traditional NiCd batteries 955 in/lbs of driving torque for heavy applications like tightening carriage bolts, driving lags and sinking deck screws Tightens and loosens small screws, tapping screws, bolts and nuts Impressively lightweight at only 2.2 lbs and compact at less than 6" in length Faster impact driving with a no-load speed of up to 2,700 RPM and a 3,200 BPM impact rate Optimized handle dimensions for a secure grip and ergonomic comfort in all hand sizes LED light effectively illuminates dark work areas Quick change 1/4" hex chuck for simple bit replacements Responsive variable speed trigger for precise control during operation