Product details:

With this all-in-one tool, you'll no longer need to use a ruler or micrometer to measure spring height. Simple set the spring height with the highly refined measurement tube (0.01" increments), put it in the vise and start testing. The large-face analog gauge reads up to 600 lbs./in. in 10 lb./in. increments, and the precision spring height micrometer has a range from 1.500 to 2.295 in. The combos can work on all styles of valve springs up to 1.700 in. in diameter.