The CB303D is an advanced performance, DC emergency drill and driver. It's designed with a series wound DC motor and heavy duty gearbox, making it optimized for high torque and uninterrupted operation. The CB303D is a good option for emergency drills and drivers, as it offers a maximum power output of 3,000 watts at up to 456 rpm, along with a heavy duty construction and robust control system. Additionally, it has zero voltage switching and anti-condensation technology to keep the drill and driver safe even in low voltage operations. The Marathon CB303D also comes with a range of accessories and customization options, including a hand guard for extra safety, pneumatic adapters for quick connection, and a brushless motor for long-lasting performance.