Sheet Metal thickness Gauge

What’s a good sheet metal thickness gauge to purchase? I figure it’ll come in handy when I go to the yard and find scrap sheet metal that’s not marked.

Here’s a decent one I got from Amazon… Checked with calipers and is accurate enough for me…

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I bought several from amazon for $3.00 each, horribly inaccurate, threw them away. This one from miller that came with my welder is expensive but truly right on. ($12.00 I think) the one posted above by KX9M looks pretty good. I don’t go to the steel yard without one.

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