Iron Arcane Key (Thaumcraft 4)

The Iron Arcane Key is an item added by Thaumcraft 4. It allows the owner of Arcane Doors to grant other players access.

Usage
Right-click on an Arcane Door to link the Key to the door. Give the Key to another player to give them permanent access to that Door when they use the Key. Note that they will not be able to break the Door or give anyone else access.