EN ISO 6789, BS EN 26789, ASME B107.14M Each Tool Factory Preset and Calibrated No Certificate of calibration Latest Ergonomic SoftFinish multi-component handle enables optimal power transmission Audible and perceptible click when the pre-set torque has been attained Guaranteed Torque Accuracy of ±10% to 5000 cycles / 1 year 50% greater loosening torque Mechanism insensitive to industrial lubricants Automatically resets for next torque cycle