If you are going to work on your diesel fuel injectors you are going to need a torque wrench. If you are going to tighten your alloy wheel lug bolts properly you should use a torque wrench. In fact if you do your own work you should have a 1/2 inch clicker torque wrench in your tool box. I know why you don't have one. They tend to be expensive for the limited amount you might use one. Well, now you can get a quality one for a very good price. This is a must have for working on diesel fuel injectors.
It comes with a nice molded plastic case and instructions. This wrench is 18 inches long for good hand torque. Fits all standard 1/2 inch drive sockets.