How to make a model a custom tool?

I have an axe which is split into 2 unions, and it will be a tool for players to use, with custom animations when activated. Now the problem is that I don’t want it to be a Roblox tool, so how would I make my welds properly attach the hand? Do I use motor 6d?

depends on if your goanna animate the how the character is hold it

yes, using Motor 6D, i recommend watching some videos, this is quite [medium] to understand