Bosch GSB 21-2 RE Professional is the most powerful impact drill in its class and best impact drill known for most robust applications. Bosch's impact drill has the best high-performance motor which is capable of generating torque for heavy-duty tasks. Bosch impact drills are known for best in class power to weight ratio and have superior ergonomics which makes sure that users do not experience fatigue even when they have to use the tool for extended periods. The impact drill has a sturdy metal gear housing which ensures the longevity of the drill. Bosch has built an anti-rotational mechanical overload clutch for this impact drill which provides work safety for the users even while using the tool for toughest applications. This impact drill has a single-sleeve keyless chuck with auto lock which ensures faster bit changes. The Bosch professional impact drills meet the highest requirements with regard to power, versatility and precision. Bosch impact drills are developed for professional users with high requirements with regard to performance and lifetime.