Adjustable Window Security Bars (Steel), Window Locks Bars Inside for Prevent Burglary, Window Stoppers for Vertical/Sliding Windows, Window Safety Bars Extends from 16.3-29.3 in(4 pcs)

This product is made out of sturdy metal so it's not going to break or bend. It easily fit in my ancient window that lifts vertically and has a broken lock. The nice thing is it's adjustable so if you want to open your window for some fresh air, you can set it so that your window will only open as far as you want. This is an excellent window lock and I'm going to purchase a couple more for my other windows. Its definitely worth buying.

I love these security bars. They are heavy and heavy duty. I highly recommend. I’m having to return them because the alignment doesn’t measure up to fit my windows.

We have a GSD and she has fluffier tail and most diapers have a very snug or too tight of a fit and these are PERFECT! thank you so much! I will buy more!

I first saw these at a police department "anti-burglary" presentation and knew I could use them.It comes in two sizes, the larger was supposed to fit my windows. They have many adjustment locations.The problem was that one set of holes was too long to fit and the next shorter made it too short to fit, requiring me to make a spacer.Good, quality product, even looks good, just did not fit my window,

Yall, you won't believe this. So I got these originally for security for my basement windows. When I installed them I noticed how tight it closed my windows and how the draft was gone from them. So I went to another drafty window and installed them there and the draft was gone. So began my many purchases...fast forward to a whole lot of purchases and a bunch of windows secured and I have literally reinforced and winterized\summerized my house. Hahahahahha! I still have to put those fuzzy inserts in between the windows to catch the draft in between, but I no longer have issues with windows drooping or not closing all the way, and air getting out or in!!!!!!

They don’t fit my windows properly so have to install between pegs/slots and this makes them fall out of the window easily.

Good security bars. Look solid and reliable.

I need to keep one of my windows slightly ajar, but wanted to ensure no one could push it open further and enter my house that way. I bought this bar, and it’s great. The distance between the top (inside groove) of my window frame, and the top (outer wood) of my lower sliding panel is roughly 24 inches. The bar fits perfectly. There is a screw hole on the bottom “foot” of the bar, which makes the it way more stable when used. Otherwise it may fall with minimal shaking/pulling on the window. No screws are included, but it’s a handy feature. Also, there are 13 pinholes that allow you to adjust the bar length, spaced every inch. Just measure before you buy, and have a screw and drill handy, and this product may be for you.