Variable speed controlled by trigger 210 Nm fastening torque, for high speed and high performance Suitable for heavy duty applications including fastening hex coach screws and hardware screws 1/4" hex shank One touch bit installation Four electronic selectable speed settings for soft, medium, hard, max T-mode designed to drive self-drilling screws into thin metal at high speed, then stops after the tool starts to impact, preventing over-tightening Anti-bit wobbling structure Capacity machine screw M4 to M8, hex bolt (grade 4.8) M5 to M16, hex bolt (grade 10.9) M5 to M14 and coarse thread screw 22 to 125mm