easy adjustment with a click dual stop signal dual scales Nm / ft-lb counterclockwise tightening thanks to the interchangeable square drive all sensitive components are protected by a robust steel tube housing in a U-shaped aluminum profile calibration using the perfectControl® calibration unit No. 7794 or calibration system No. 7706. Readjustment does not require disassembly. Certified according to DIN EN ISO 6789-2:2017 Supplied in a fabric bag Deviation value ± 4%