The DH18DBL is a Brushless Hammer with SDS-Plus Shank and a full load impact rate of 3950 a minute Features: - Impact Rate 0-3950min - Drilling capacity in concrete 26mm - Efficient brushless motor works approx 50 more than the conventional brushed DC motor per battery charge - Reactive Force Control RFC system reduces risk of injury from tool overload - Constant speed control - Over current protection - 3 mode action: rotary drilling hammer drilling or chiseling - Built-in LED light - Remaining battery indicator