This Bosch Bulldog hammer provides superior performance and an outstanding impact-to-weight ratio. The GBH18V- 24C 18V Brushless 1 In. SDS-plus Bulldog Rotary Hammer delivers 1.8 Ft.-Lbs. of impact energy (EPTA). It weighs only 8.5 Lbs. (including battery). The hammers brushless motor maximizes battery runtime for extended performance. It has KickBack Control, which reduces the risk of sudden tool reactions in binding conditions, and an anti-vibration system for great user comfort for extended periods of work. Its ergonomic L-shaped design provides better control when drilling overhead or in tight spaces. The 360-degree side handle provides a variety of grip positions for maximum ergonomics. The hammer has Vario-Lock positioning to optimize the working angle when the tool is used in hammer-only mode. The hammers robust power system produces 0-4,350 no-load bpm and 0-980 no-load rpm. It has three modes of operation: rotary hammer, rotation only and hammer only. This hammer features integrated connectivity, providing a link to the free Bosch Toolbox app on a connected device to customize settings. The CORE 18V PROFACTOR Performance 8.0 Ah battery is compatible with Bosch 18V tools, is optimized for PROFACTOR tools and delivers 2x more runtime than the CORE 18V GBA18V40 Compact Battery.