this post was submitted on 07 Sep 2023
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[โ€“] JohnDClay@sh.itjust.works 19 points 2 years ago (1 children)

Maybe they mean ruby infused grinding wheels?

https://www.travers.com/product/radiac-ruby-surface-grinding-wheels-71150

Or maybe they were exaggerating a little bit and thinking about ruby bearings.

https://www.renishaw.com/shop/Product.aspx?Product=A-5000-3611

[โ€“] booly@sh.itjust.works 2 points 2 years ago

A million f[beep]ing diamonds!