So I’ve assembled a collection of micrometers and vernier calipers of varying quality, and it’s time to dive in and measure some very small things. Some of you will be metrology enthusiasts ...

All of the traditional Vernier style calipers on our list measure interior and exterior dimensions, as well as including an analog depth gauge for when you need to know the depth of something.

I'm not sure what size the bolt is, so I'll need to measure it. I've got the vernier caliper as it allows me to take really accurate measurements. I'll then need to get the new bolt and replace it.

I'm not sure what size the bolt is, so I'll need to measure it. I've got the vernier caliper as it allows me to take really accurate measurements. I'll then need to get the new bolt and replace it.