The Ti Project
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These epic 3YH keychains are cut out of either 0.063" thick aerospace grade titanium or 0.06" thick 304 stainless steel and have a wide variety of available options. 3YH, also known as 3 Years Hollow, is a hard rock band from the Quad Cities, Illinois / Iowa. Check out their website here.
If you're interested in anodizing, make sure to take a look at the last picture in the listing for color reference and select the voltage for solid colors, voltage range for fades, or selection of voltages for patterns accordingly.
Disclaimer: As always, this listing is NOT investment advice nor an endorsement and you should always do your own research before investing money in any speculative asset!