Review on EMI Deluxe Caliper Ruler EKR 453 by James Roberts

I broke down and ended up buying my first pair of calipers and they work great. I had to do this as soon as I found out I needed to interpret an EKG for a class and I recommend this to any student. Width and height are simple enough. One feature includes an instant result for each heart rate and I have to say I've never figured out how to use it, otherwise this part of the line is wrong. This is the only reason I didn't give a star because I was really happy with the quick reference list and I still mainly wanted calipers. It was a great, quick and inexpensive purchase that was very helpful to the class.