This Bosch Bulldog hammer is a manageable, powerful rotary hammer designed to get the job done. It provides superior performance and an outstanding impact-to-weight ratio. The GBH18V-22 18V Brushless SDS-plus Bulldog 3/4 In. Rotary Hammer 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. The hammers easy-to-handle L-shaped design provides better control when drilling overhead or in tight spaces. It delivers 1.4 Ft.-Lbs. of impact energy (EPTA). It weighs only 5.1 Lbs. (tool only, not including battery). The hammers brushless motor maximizes battery runtime for extended performance. The 360-degree side handle provides a variety of grip positions for maximum ease of use. The hammer has Vario-Lock positioning to optimize the working angle when the tool is used in hammer-only mode. It has three modes of operation: rotary hammer, rotation only and hammer only. The CORE18V 4 Ah Advanced Power Battery included in this kit delivers 2x the runtime and 60% more power compared to BAT612 18V 2 Ah Standard Power Battery.