Indicating Torque Wrenches
According to DIN EN ISO 6789 torque tightening tools are differed into indicating (type I) or releasing (type II) models. Type I does indicate the torque value by a mechanical scale, a dial gauge or an electronic display ('measuring wrench')
- Class A = with torsion bar or beam lever
- Class B = with scale, dial or digital display
- Class C = with electronic measuring
- Class D = screwdriver with scale, dial or digital display
- Class E = screwdriver with electronic measuring