I've got the 3/8 and 1/2 ones. The screws fell out of the metal ratchet backing plate of the 1/2" one. I'm looking for more and for now have it taped together. :rolleyes:
A little loctite and occasional inspection may be a good idea.
I have both of those Northern Tools torque wrenches for general use (mainly lug bolts) at home and they are checked every other month on the Snappy truck. They have never failed to be within 4% at any time. I also spot check them against my CDI electronic wrenches (using 1/2" sq socket or 3/8 sq socket) and they never cease to amaze me at how accurate they are.
Just remember to always back them off to the lowest setting before storing them in their case.