File
From Cantr II Wiki
An essential item for any town leader in a developped town. If you want a building that you can keep locked, and still use it with ease, you need a file. A file is used to copy keys, which you can do by clicking on the "copy key" button next to the key you wish to be copied.
Construction
Object: File
Days needed: ??
Raw materials needed: 110 grams of steel
50 grams of wood
Objects: none
Tools needed: trowel