Review on Defender Security 10827 Door Reinforcement by James Baker

Installation is quite easy and the locks are unobtrusive and look good after installation (A). You may need to cut a corner of the door panel (B) like I did to accommodate the corner of the lock. Of the four locks I bought, two are easy to work with, one is medium hard and the fourth is very hard. Unlock. The stubborn needs to be rocked hard a few times (C) to get it to the point where it can be unhooked. I tried to send a question to the seller about this (from the Revain website) but after submitting I got a 404 message meaning they can't be contacted. At least not. I've had painful little cuts on my thumb and forefinger caused by tiny burrs and very sharp edges on the strands. I had to shorten them. In drawing (D) the arrow points to the edge that I had to file (I also filed the corresponding bottom edge). All four locks required this modification. I agree with other commenters that the bolts that come with these locks are cheap metal and of significantly lower quality than the locks themselves. I will replace the screws with something stronger. I'm not sure these locks will last long. Two hard-to-pick locks sound and feel like metal on metal. Instead of gradually getting weaker, they can get worse. I'm not sure what I would have to do if unlocking one of them was impossible - rip out the doorpost? Only three stars because of two problematic locks and lack of communication with the outside world in the company. Follow-up after 2 weeks: downgraded to one star. I still had cuts on my fingers from fighting those curls and had to go back and file the remaining edges. Every edge of the Defender is dangerous. Filing the edges takes a lot of time and ruins their appearance, but it's easy to do since they're made of soft aluminum. I was wondering how robust (read "safe") these things really are. Most safety equipment I know is made of hardened steel. Aluminum isn't very strong, and the Defender's width at the point of maximum stress is less than 1/8 inch. I'm wondering if it's made of some kind of special aluminum? I found that Defender is manufactured by Zhongshan Kaiying Hardware Mfg. Co. Ltd. in China (of course). You can buy them on Alibaba for less than $3 each in quantities of 50 or more. For less than $3, you can't expect anything high quality even in China. They imply the Defender is UL listed to withstand up to 800 pounds of force. Which UL? Underwriting labs? You cannot verify UL certification information without an account on it. In other words, they don't want clients to be able to verify certificates. WTF? (In order to open an account, you have to tell everything about yourself, set a password, etc.) I assume that the UL listing is fake. But even if it has a UL rating, and even if the UL rating actually means something, £800 isn't as much as it sounds. I've found evidence online that an average height man can kick (forward, on a flat foot, as if kicking in a door) with a force of 1200 pounds. That's half the £800 the Defender costs. My personal feeling about the strength of this thing - made of soft aluminium, thin at the point of impact - is that a sane child could break one of these things in one fell swoop. I'll keep them to myself because they're already installed on the door, but I'm looking for something else that will give me better security than these things.