This Bosch 18V BulldogTM hammer consistently outperforms the best-selling 1 In. corded 11255VSR BulldogTM, making it better than the best. The Bosch GBH18V-26K24AGDE kit pairs two CORE18V 8.0 Ah PROFACTOR Performance Batteries with an SDS-plus® BulldogTM 1 In. Rotary Hammer that delivers 1.9 Ft.-Lbs. of impact energy (EPTA). The included dust-collection attachment provides a self-contained HEPA dust solution for max mobility. 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. The CORE18V 8.0 Ah PROFACTOR Performance battery delivers 100% more runtime and over 75% more power than the CORE18V 4.0 Ah battery for high-demand applications. Each battery is engineered with 21700 cell technology and the exclusive CoolPack 2.0 technology to manage the heat of the higher power-density cells. The dust collector has a HEPA filter, helping users of the 18V 1 In. GBH18V-26 BulldogTM rotary hammer move toward compliance with OSHA silica dust regulations.