Powerful brushless motorStable and reliable performanceElectromechanically integrated design for safe and spark-free operation. Low motor wear, low noise output and high power conversion. No need to replace carbon brushes, resulting in longer service life.Precise 30-stage gear adjustment360° infinite knob with up to 30 gear stages, which can be adjusted incrementally or by rotating quickly through the gears. Depending on the drilling/screwing mode, the maximum torque or speed can be controlled separately for precision and accuracy to meet the advanced needs of professional users.