ordered these door handles to replace all of mine in my home in July of last year (not even a year old) and tonight my 11 year old son got stuck in the bathroom for almost 2 hours because the lock mechanism completely failed. Another of these same knobs did the same thing earlier this year on another room which luckily had another exit. He was panicking and we had to tear out the door frame to get access to him from outside the door that had no other way in or out. It appears these knobs are out of stock but wanted to make sure you all were aware how dangerous they are. I need to remove all of them and replace them with new ones for the safety of my children and guests. Do NOT buy.