One of the tricks to building a winning engine is detailed in Jake Lamont's book How to Build and Maintain Competitive YET LEGAL Formula Ford 1600 Engines, namely fine-tuning the tension of the oil ring to balance drag and oil control. How do you do that? By installing the oil ring assembly on a piston and using a fish weighing scale to measure the drag when you pull the piston through the cylinder!
This compact digital scale makes the job easier and more accurate than ever before. The backlit LCD shows weights in 0.1 lb increments. Because the load sensor is fully electronic instead of sprung, the hook does not pull out of the scale as with a cheaper analog scale. This eliminates the problem of the reading bouncing as the hook extends and retracts. A very fast-operating display hold function makes it even easier to read (note that you must pull slowly and smoothly).
The 80 pound capacity is useful for many other jobs around the shop as well: Weigh parts or even fuel jugs -- anything up to 80 pounds that can be lifted or pulled by the hook.
Operates on 3 AAA batteries (included).