If you’re reading Hackaday, there’s a good chance you had a rock tumbler in your younger days ... [Fraens] is unique enough to stand out. To make a basic rock tumbler, all you really need ...

If you’re reading Hackaday, there’s a good chance you had a rock tumbler in your younger days ... [Fraens] is unique enough to stand out. To make a basic rock tumbler, all you really need ...