In the caliper corner are a very cheap (around £5, or $6) digital caliper, another very cheap plastic analogue Vernier caliper, and my Mitutoyo 530-122 Vernier caliper. The former two are my ...

It’s maddening. Getting solid measurements of the distance between holes would help, which is where these neat snap-on attachments for digital calipers come in. [Chris Long] came up with the 3D ...

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.