GIF Below
https://gyazo.com/3130ce334e3d77d5e1763363f3566972
This has been happening to all my tools, I've asked this question a couple times but the answer is always "Change CustomPhysicalProperties Density" which hasn't worked. Help would be appreciated.

3 comments
I only have a single mesh-part in my tool and its not anchored.
try to disable CanCollide
or your handle, the important thing is something in your tool is Anchored