You all know that you can lock Palisade doors and you can make keys. well this can be an addition to Locks & bolts the ability to create a lock for you house and cellar and of course you have to make the lock it self out of metal preferably iron but of course there can be a new skill to add on (for those who might say something) you can add a new skill lock-picking to get past the locked houses and cellars to get what you want and it will need a skill value so the better the value the better chance you can break the lock.
oh almost for got the tools to pick locks can be wooden but it will have a very low rate of picking the lock no matter how much the value is. then of course metal locks and depending on the type of metal give you a better chance to pick it and this Q doesn't matter
Hope you like this idea
Side note: I searched and found NO idea like this only reason why i am posting this