Review on EMI Deluxe Caliper Ruler EKR 453 by Adam Taylor

EDIT: DO NOT BUY. Buy a caliper somewhere else cheaper. I am lowering my rating to 1 star. The whole point of this item is that it is a set. Well, the only useful thing in this set is a caliper, which you can buy for half the price. The ruler is useless. The markings on the ruler are too big to be useful. The halftone marks are printed in 0.04 seconds with a gradient of 0.2 seconds. To be useful for fast and accurate measurement of PRI/QRS/QT, hashes should be 0.02 seconds long and have a gradient of 0.1 seconds. ---Bought several of these sets for my monitor department. We especially needed clear rulers for faster reading of PRI/QRS/QT/ST paper/strips. These rulers are NOT clear. They're clear plastic with a label on the front, and then for some godforsaken reason they decided it would be nice to put a piece of white paper on the back. Why? It took quite a bit of elbow grease and goo gone to get the paper and then glue the plastic together. Now they are clear and usable. The calipers are decent, keep the specified distance, the tips converge as they should. Made in Taiwan.