Use: Controlled screw tightening in the range of 1,2 - 6 Nm, High-speed, controlled tightening enables serial production, Electrical and electronic hardware industry, instrument-making industry and industrial manufacturing or in quality control, Features: Adjustable torque screwdriver - with scale, With 1/4" female hexagon drive for use with 1/4" hexagon bits as per DIN 3126 - C 6.3, With adaptor also suitable for 1/4" square drive sockets as per DIN 3124, Working accuracy: +/- 6 % tolerance of set torque, Acc. to DIN EN ISO 6789, traceable to national standards, Precision radial ball clutch and cam design for controlled bi-directional tightening, Precision mechanism slips very noticeably when the pre-set value is achieved, Automatic resetting to the starting position, "Positive-Lock" system automatically fixes the set value preventing it from wrong setting, 4 models in the range 0,08 Nm to 9 Nm, Micrometre scale graduation: 1 cNm resp. 0,1 Nm, EPA-conformant (Electrostatic Protected Area), for use in sensitive electrostatic applications, Scope of delivery: Torque screwdriver type QSN, 1/4" square/hexagon drive adaptor (No. 757-20), Model No. QSN 600 FH / QSN 900 FH with additional T-handle for easier work, Test certificate acc. to DIN EN ISO 6789, Delivery in sturdy cardboard packaging