spoiler
For people that don’t know this is not how you use Calipers
14 points
I was expected to know that one was stainless steel and the other was aluminum, but not the specific grades of stainless or aluminum. Stainless and aluminum can look very similar when they’re dirty, and 300 series stainless won’t stick to a magnet just like aluminum won’t stick to a magnet. But if you pick them up or even rap on them with your knuckles you can tell the difference.
