In aviation there are sometimes need to measure breakaway torque, we use dial torque wrenches for this.
All but one of my torque wrenches is good for rh or lh applications.
The "click" type and electronic indicating types use the same mechanism, and it matters not rh or lh.
I went to calibration school for our torque calibration machine and wrenches.
I checked my 40+ year old deflecting beam the other day, within 1%

. (bought it new!)
Use a quality torque wrench and have it checked regularly, do not use after dropping till calibrated.
Ed
