I use the Snap on torquer wrenches in my shop but for a really good and affordable one, the Craftsman at Sears is a nice piece and stays inn calibration well. Just always make sure to back off the torque reading to zero whenever you are not using it with any click type wrench. If you leave the wrench set at say 70ft-lbs then the inner rod will take a 'set' over time and you will slowly go out of calibration.