If I don't fit you must acquit! If I do shame on me.

I should fit in your pocket, but I'm more likely to swing and jingle.

A little shake, a fiery flair, I sit with salt most everywhere.

Find me in caves Along with my brother Don't mix up our names We're not one another We may both be sharp And hard to recall I'm surely the best And above it all

I’m a part of you. Hard to pick off but not impossible. I’m small and skinny. What am I?