Signaling Torque Wrenches
According to DIN EN ISO 6789 torque tightening tools are differed into indicating (type I) or releasing (type II) models. Type II is to be preset to a certain set point activating a signal as soon as the set value is achieved ('signaling wrench'):
- Class A = adjustable, with scale/digital display
- Class B = preset
- Class C = adjustable, without scale
- Class D = screwdriver, adjustable, with scale or digital display
- Class E = screwdriver, preset
- Class F = screwdriver, adjustable, without scale
- Class G = with beam lever, adjustable, with scale