For professional screwdriving/fine adjustment AND for torque-controlled screwdriving. Secure slip-over torque mechanism with quick setting for five selectable clockwise/counterclockwise tightening torques (1.0; 1.5; 2.0; 2.5; 3.0 Nm) and one fixed position (Torque Lock) for unlimited loosening and tightening moments. Quick-release holder for high robustness. Suitable for bits with 1/4" external hexagon drive.