Treasem Home Security Door Lock, Inside Door Reinforcement Lock for Your Family Safety and Childproof Use, 3 inch, Aluminium Alloy, with 8 Screws, 2 Pack, White

I wasn't really expecting much when seeing it on the website but when it arrived I was impressed. I installed 2 in just a few minutes and they work amazingly well. I then went outside to the front door and actually tested it. I rammed into it with my shoulder to see if it would hold up and it never budged. I went back inside, checked the bracket and screws and to see if there was any movement in the install and there was no sign of any damage at all. I had some 4” long screws that I used instead of the ones that came with it, just to get additional strength into both 2x4's that are behind the frame around the door jam. I'm not a little guy @ 6'4”, 240lbs, 48 jacket, 34” waist. I'm going to be installing these on family members doors and whoever else around me wants them. Price is more than reasonable. I highly recommend this.