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【CERTIFIED ACCURACY】Adjustable torque 5-60 cNm (0.05-0.6 Nm), ±6% accuracy per ASME B107.300 & ISO 6789; includes calibration certificate with serial number for full traceability. 【FAST, PRECISE ADJUSTMENT】Clear 0.5 cNm graduated scale sets exact torque in seconds; release mechanism disengages at target torque to prevent over-tightening of delicate screws. 【QUICK-RELEASE 1/4" BIT HOLDER】Universal 1/4" hex holder accepts standard bits and socket adapters; tool-free bit changes speed up repetitive assembly work. 【BUILT FOR PROFESSIONALS】 Ideal torque screwdriver for electronics repair, electrical panels, optics, watchmaking, laboratories and precision industrial assembly. 【TAIWAN QUALITY】Heavy-duty aluminium body manufactured in Taiwan to high tolerances for long-term torque stability under daily professional use.