According to [Premier Guitar](http://www.premierguitar.com/articles/22602-rig-rundown-slipknot), Jim Root uses Jazz III picks.
In this guitar pick photo posted by Castellano, the Dunlop Jazz III picks can be seen.
I’ve been using Dunlop Jazz III guitar picks since I started playing
I like these picks a lot. I like the fact that they're small and easy to grip, and I like their thickness because I prefer thicker picks over thin ones
These are great for speed picking and really anything you can think of. They really allow you to get close to the strings.
Favourite Guitar Pick EVER
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