The STAHLWILLE DAkkS calibration laboratory for the measurement of torque has been accredited by the German Accreditation Body (DAkkS) in accordance with the DIN EN ISO/IEC 17025:2005 standard. The transfer torque wrenches and torque measuring heads used in the laboratory are subject to regular testing by the Physikalisch-Technische Bundesanstalt (PTB) in Braunschweig. The accuracy of the torque wrench must be verifiable and traceable over several stages. This is the only way to ensure the reliability of the measured values. In the first stage, the user tests the accuracy of their torque tools in their own facility with a suitable, calibrated testing device. In the next stage, this testing device will be checked in the STAHLWILLE DAkkS calibration laboratory. Due to the accreditation by the German Accreditation Body (DAkkS) according to the standard DIN EN ISO/IEC 17025:2005, the traceability of the measuring equipment to the national standard according to the DIN EN ISO 9001:2008 standard is guaranteed.