A rotary hammer drill is a heavy-duty electric power tool built for drilling and chiseling into tough, rigid materials like concrete, brick, stone, and reinforced masonry. Operating with an L-shaped vertical motor configuration, it uses a specialized electro-pneumatic hammer mechanism to deliver high-impact energy directly to the bit rather than relying on rapid mechanical friction. Key components include a quick-change keyless chuck, a mode selector dial for switching between rotary drilling, hammer drilling, and pure chiseling, an ergonomic rear handle with an integrated trigger switch, and an adjustable front auxiliary handle that offers enhanced control and stability during high-vibration applications.