Here we are going to create are base for our script
What script are we going to use?
For this script to work we are going to create a script for "Player Chat Message" I am going to name it: "Replace [item]" to keep our Ultra Customizer system clean.
First we are going to get the item in his Main Hand.
Now we need to convert our item to a string so we can use it in our chat.
The next part is very important and needs to be followed closely
Now we are going to add a "Replace String (Ignore Case)"
Our first input will be "Player Chat Message"
The second input will be "[item]"
And our third input will be "Item To String"
Now we are done! When we type [item] alone or in a sentience it will be replaced with the item in your hand. (If you have nothing in your hand you will get "AIR")