This Bosch 18V Bulldog™ hammer consistently outperforms the best-selling 1 In. corded 11255VSR Bulldog™, making it better than the best. The Bosch GBH18V-26K24A kit pairs two CORE18V 8.0 Ah PROFACTOR Performance Batteries with an SDS-plus® Bulldog™ 1 In. Rotary Hammer that delivers 1.9 Ft.-Lbs. of impact energy (EPTA). The hammer’s brushless motor maximizes battery runtime for extended performance. It also has KickBack Control, an integrated sensor to stop tool rotation in bind-up situations; Electronic Precision Control, for smoother bit starts; and Vibration Control, for extended user comfort. It weighs only 8.4 Lbs. (with included battery). The kit features two CORE18V PROFACTOR Performance Batteries, which each provide 100% more runtime and over 75% more power than the CORE18V 4.0 Ah battery. It is designed to deliver power and performance for high-capacity tools. Each 8.0 Ah PROFACTOR Performance Battery weighs only 2.14 Lbs. for the ideal balance between size, weight and power. It is engineered with 21700 cell technology and the exclusive CoolPack 2.0 technology to manage the heat of the higher power-density cells.