16-piece tool set. For professional screwdriving/professional fine adjustment AND for torque-controlled screwdriving. Secure slip-over torque mechanism with quick clockwise/counterclockwise setting and five selectable tightening torques (2.0; 3.0; 4.0; 5.0; 6.0 Nm) and one fixed position (Torque Lock) for unlimited loosening and tightening moments. Quick-release holder for high robustness. Suitable for bits with 1/4in external hexagon drive. 15 tough bits (89 mm length).