No matter what period of human history you pick to look at...........door locks were made to do one thing..............keep honest people out. Crooks and thieves will get in if they are determined enough. Locks have been in an evalutionary process since the very first one was made. The one in the photo has been in use since the early 1800's. These kind were available for purchase in hardware stores and catalogs. A few were also made locally.
Todays locks are still in an evalutionary process. They are harder metal. Come with complicated systems for opening and some are electronic for even more security.
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