Industrial Tools
Torque Systems

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

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