Best way to hide a local Part?

I am trying to make my custom local script tools without using the Tool object. When the player equips a tool, It instantly appears and gets attached to their hand.

I have no problem on making a script like that. However, I don't know how I could hide the tool after unequipping It. In older versions of roblox, parts were hidden in the Lightning service whenever you wanted to make It dissapear temporarily.

I though about using the ReplicatedStorage, but I have no idea if that could make the local object accessible to the server and clients (which would be an issue).

Any ideas? (Sorry for my english)