Abstract: The invention pertains to the field of manual fastening tools The invention is an accessory to most fastening tools, of any length and size: when coupled to the handle of the fastening tool of choice by means of a quick adaptive coupling system, the device's electronics will show on a digital display the instant torque resulting from the sensed applied force and its measured specific arm. The display's touch screen allows entry of Calibration data, target torque values, force arm length alternate entry, and selection of measuring unit.