https://thume.ca/2019/03/03/my-tungsten-cube/
Looks like it's just a heavy cube to use as a fidgit toy? I wanna play with it now too lol.
Edit: I don't know how to link directly to a single amazon review but holy shit read the one from Richard , it should be the first https://www.amazon.com/Tungsten-Cube-1-5-One-Kilo/dp/B00XZBI...