To get the Inscriber, you must first access your Crafting Menu, there you will have the option to give yourself the item.
Selecting this option will spawn an Inscriber item in your Inventory. This item cannot be dropped, sold, bartered or put in any bags/containers.
If you want to remove the item, choose the new option that will appear in your Crafting Menu once you have the Inscriber in your Inventory.
Using the inscribers power on any item will trigger a conversation that allows you to change the items name, it's pretty self explanitory from this point on.