Jeacent Adjustable Window Security Bar, Patio Door Lock - Sturdy Steel, Extends from 15 1/2" to 29 1/2"

Used this vertically for a couple windows and it works great and was easy to setup, can be adjusted to allow the window to be open a crack. The adhesion is okay, it's a little pricier than other options, but so far it appears to be good quality.

Pretty great product. It's easy to install / remove and does what it claims to do. I installed these into double hung windows that were installed incorrectly and couldn't lock as the male and female parts of the lock didn't line up no matter what I tried. I was able to wedge this in between the lower window and lip of the upper window, and when in place my windows couldn't open. This product doesn't have any cons other than the fact that it takes 30 seconds to get the unit fully extended as the locking pin deploys after each 1 hole movement. I see people complaining about the advertised length vs the actual length, but my guess is that they either bought the wrong product (there are two lengths) or they don't know that the screw attached to the rubber stopper can be safely unscrewed partially to reach the advertised max length.

It's surprising how many poorly made security bars exist for what should amount to a very simple product... I researched many bars on Amazon and my local big box hardware store and left disappointed with what I surveyed; notably poorly used materials (plastics), and lack of adjustability. Simply put, I want a bar made to withstand forceful intrusion that isn't complicated by too many working/ poorly designed parts. This security bar fits the bill regarding durability and ease of use. Everything is metal, it's adjustable to millimeters, and secured properly such that a human being can't force this open since pins and threads are used vs. tension. The only knock I have against this is the velcro provided; it's not cut to dimension and offers little stability by itself. Nonetheless, the tension should be sufficient to keep this in place, and the fact that there is a hole to screw this into something is a plus. Overall highly recommended! Look no further if you want something that will do what you expect; stop intruders from forcing your window/door open. Cheers!

I used this to secure a vertical window that has a window AC installed. It's well made but I was actually close to returning it because it was just a little too short for my window. The next peg down was too tight and the next peg up was too short. Just then, I realize that you can unscrew the rubber portion at the bottom for micro adjustments. If you can't get a tight fit on your window, you'll want to use the screw near the rubber portion to get it as tight as possible. I do think the bar is probably better suited for sliding glass since it will sit flat on the sill and keep the window from being opened. For vertical windows, someone could just break your window and just push the bar out of the way. I still think it's good to have and extra peace of mind but I would probably go a step further with sash locks in addition to the security bar for extra protection. It will certainly defeat the average dumb crook but if someone really wants in, you'll want more than a bar that can be defeated by breaking the glass. It's still a good product and very well made and sturdy which is why I'm going 5 stars.

I really liked the Strength of the steel It is very adjustable and locks in its place , Easy to Install and very discrete, worked well for my sliding window has a rubber end and smooth finish, I did not use any adhesive

Easy to use and works as it should.

Wanted something to secure the sliding glass door from the house to our screened-in patio (lanai), so we could leave it open "just a crack" for the cat to use. When fully extended in the track of our older sliding door, it leaves about a 6 inch opening ... perfect for our Fat Cat, but too narrow for a human. This ended up being considerably cheaper (and much easier) than installing a cat door! There is virtually no installation. We just set it in the track, and even my adult son can't force the door open when it's in there. For added security it can be attached to the wall ... which I haven't gotten around to yet, but looks very easy to do.

Not sure if I was using it on the wrong type of window but I’m sure it would work for some types. Did not work for me and isn’t super sturdy. I think it may only fit certain windows.

Easy to install and feels very solid. No issues. Happy with the purchase.

Bueno, funciona bien pero me hubiera gustado más largo

The best one. We used them for the basement window where our daughter sleeps very sound. And, for the new patio door and we just used the pressure without drilling a hole in the brand new aluminium which is not a good idea. My husband tried very hard to open the door and the window without even a slight move. Very happy with these bars.