Panasonic EYC143B 14-2/5-Volt Cordless Lithium Ion Impact Wrench/Drill and Driver Combo Kit with Light New 14.4-Volt Li-ion Technology delivers less weight than 12-Volt and longer run time. Drill Driver delivers 390 in.lbs of power in a 3.5lb-Package. Electronic performance monitoring system delivers safe li-ion high performance. Impact wrench delivers 1,640 in.lbs of power with 3 speeds and a brushless motor for 25-Percent longer life. Hard Mode: 1,640in.lbs / 0-2,300rpm / 0-3,000ipm. Medium Mode: 750in.lbs / 0- 1,400rpm / 0-2,800ipm. Soft Mode: 440in.lbs / 0-1,00rpm / 0-2,000ipm. Get 18-Volt performance in a 14.4-Volt-Package with less weight and size than 12-Volt