AceMining Door Reinforcement Lock Withstands 800lbs of Force - Silver Extra Door Lock with 8 Screws Prevents Unauthorized Entry,Add a Door Security Lock for Home Safety & Privacy

I first learned about these while I was at work. Some drunk guy had a medical emergency (put a glass cup up his rear and it broke), tried kicking in the door and it would not budge. After I decided to buy one.

It is perfect! no flaw whatsoever. Easy to install and sturdy. Ive been terrified about my kids getting out of the back door and onto the balcony but this...this really gives me peace of mind. I hope to order another one (black so my landlord wont notice it as much, were not allowed to have them on our doors).

Screws included are no good. Replace with longer and stronger for better security.