DIN EN ISO 6789: 2003 Type 11, Class A. Factory checked calibration certificate. TORCOFIX K Adjustable Torque Wrench. Adjustable ratcheting torque wrench with magnified torque setting window for error reduction.. Release system with audible signal Dual scale: Nm & lbf.ft Additional micrometer scale Lever breaking mechanism Square drive system ±3% accuracy Ergonomic soft grip design Tubular Steel construction with Satin Chrome finish