Thankfully, portable technology for key making has made it much easier for locksmiths to deal with the many problems that can arise in regards to a home lockout. If you’ve lost your keys for good (or for an extended period of time), a locksmith can come and make a new copy for you. They’ll be able to use the lock(s) in question in order to make the appropriate pattern, which they can then use to make a new set of keys.