The Bosch GBH18V-20 18V 3/4-inch SDS-Plus? rotary hammer delivers an exceptional performance-to-weight ratio for anchoring in concrete, drilling in masonry, core cutting and chiseling. With 1.3 ft.-Lbs. Of impact energy and a no-load BPM rating of 0-4, 550, This hammer work as hard as the user. It provides three modes ? rotary hammer, rotation only and hammer only. The powerful GBH18V-20 requires a Bosch 18V 4.0 Ah battery or higher. This hammer works with Bosch PRO+GUARD? dust solutions ? an end-to-end dust-collection system that helps users move toward OSHA Silica dust compliance. At only 5.7 lbs. (Tool only, not including battery), It has an ergonomic design and soft-grip handle. It has electronic motor and cell protection to protect the tool and battery from overload.