Unlocking a door with a key lock is a common task that most people perform on a daily basis. It is a simple process, but it is important to do it correctly to avoid damaging the lock or the key.
The first step is to insert the key into the lock. The key should be inserted all the way in, until it stops. Once the key is inserted, turn it to the left or right, depending on the type of lock. The door should now be unlocked.