Review on Vernier Accuracy Measurement Biomedical Industry by Ronny Goodman

Suitable for small jobs in the workshop. Would give 5 stars if the dial could be zeroed, but as is it suits my needs. I have regular calipers but I don't always want to take them out or store them somewhere, while these cheap plastic calipers are perfect for storing them in a sturdy and transparent case so they're easy to find.