It's always worth testing the calibration of torque wrenches from time to time. Two 5 litre water containers gives a handy 10kg load to hang on a string at a suitable distance and setting to see if it clicks.
One advantage of the cheap and cheerful "bendy beam" type is that they can't really go out of calibration
Charles
One advantage of the cheap and cheerful "bendy beam" type is that they can't really go out of calibration
Charles