Don't know if anyone can explain in detail. That's what google is for!

Start here. http://en.wikipedia.org/wiki/Cymbal

I can tell you about a couple of Zildjian crash cymbals I've used. I...

I've owned a Tama Iron Cobra Double Chain pedal for a few years now.

The Good: They take a beating and they're still in great shape, strong solid pedals. They're still very smooth gliding and...