50 - 250 kgf.cn Metric Interchangeable Head Adjustable Torque Wrench with Limit Switch. Limit Switch counts the number of "Clicks" when connected to PLC or Tohnichi's CNA-4mk2 Count Checker. Graduation: 2.5 kgf.cn - 7 7/8" OAL Torque value set with external scale and knob.