To change the lock on a regular door knob first use a screwdriver to remove the door knob and the old latch.
How to replace a door lock without a key.
The key pins correspond to specific groove cuts on a key and these are the main elements that are targeted in the attempt to unlock a door without a key via lock picking.
If these doors are locked it can be difficult to remove the lock and replace it with a unit that works.
You can re key a lock like a pro at a fraction of the cost.
Alternatively you can buy a re keying kit for the lock you already have.
Many homeowners have old doors somewhere in the house that they no longer have the keys for.
If you are able to gain access to the interior of the room through a window or some other means this is usually the easiest way to remove the lock.
Re keying kits are available for most lock brands but they re not interchangeable.
If you want to pick a lock in order to unlock a door without a lock you will need some basic lock picking tools.
Locksmiths typically charge a fee to re key an individual lock even when you bring it to their shop.