Building lock
From Cantr II Wiki
Used to keep thieves out, or criminals inside, locks are an essential thing in maintaining power in your location.
Locks can only be made out of iron, and require a screwdriver to make. One lock requires 200 grams of iron, and takes 2 days to make.
When the lock is finished, the key to it will go to the project initiator's inventory. A key can be copied, with the use of 10 grams of iron and a file
A lock cannot be passed without either the right key, or a crowbar.