How to make a custom item?

How to make a custom item like an hatchet for example? Using the game prefab and a skin. That gather for example double the amount of wood as the normal one?

 

You can't. Every item has a unique itemID which the client also needs to identify the item locally.

 

I was in a server that had a hatchet and a pick that had custom name and a skin and did 30% more gathering that the regular ones... you could obtain it from a NPC loot

 

Probably a plugin that changes the skins. The 30% more gathering can be achieved by a plugin. I don't know of any plugin on here that allows you to set custom gather on tools so I assume it's a private plugin.

 

The plugin for tool rate is here ToolsGatherManager

 

Thanks.