Review on Accurate and Easy-to-Use Plastic 150mm Caliper Measuring Tool for Simple Carpentry Needs by Michael Schafer

I needed relative accuracy, not too much rocket science accuracy or engine rebuild accuracy. For my purposes these calipers work great - they are so accurate that I can check them with an additional measuring tool; I tested them on a steel ruler. If that changes in any way, or if the calipers suddenly fall apart, I'll update my review. But I don't think it's going to happen any time soon - they're worth it.