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...
“... I have carried the tungsten with me, have grown attached to the downward pull of its small form, its desire to be one with the floor. This force has become so normal to me that lifting any other object now feels like lifting cotton candy, or a fluffy pillow. ...”
https://www.amazon.com/gp/aw/review/B00XZBIJLS/RZKKKAM6FE5AI
If you have the extra money and you are attracted to the idea of a basic shape with strange properties, I would say you should get it.
https://www.amazon.com/Tungsten-Cube-Biggest-Size/dp/B07WK9W...