GOEHNER's 1/2" Drive Digital Torque Wrench,12.5-250 ft.-lb./17-340 N.m., Electronic Torque Wrench with Buzzer and LED Flash Notification, ±2% CW Torque Accuracy with Certificate of Calibration 1 - Amazon.com
The Clicker Wrench Guide: Torque Ranges, Calibration and More – Hex Technology