Shop Square Window Locks, 4 Pack Aluminum Thumb Turn Window Lock, Secure Sliding Windows & Doors, No-Drill Install, Child Proof, Indoor Outdoor, Requires 28-36mm Clearance

Work great on my windows with window ac units and gives me peace of mind being able to lock them in place and keep out someone who may attempt getting in or stealing my units. Easy to use and install. Worth the price for 10 of them. Good design. I've used these style locks in the past and have always been happy with them.

Very string and useful once set it is difficult to get through without using tools.

This is a great product! You get a lot for your money and they are well made. I gave it only 4 Stars, because the padding that comes with the window locks, that's supposed to go in the window lock when you use it, falls off, making it very difficult to use. However, that wasn't a deal breaker for me and, again, you are getting a lot for your money! I was able to successfully use these on all my windows and now I feel much safer. I would buy these again and I recommend them to others.

Brain-piercing audio alarm will indeed wake you, and everyone else within a five mile radius, should someone be silly enough to open the door or window you have this humble alarm affixed to. Peace of mind? Yeah, it works as long as the batteries are fresh. Value for money? I'd say the doggone thing works about as well as a shrieking harpy stuck with a cattle prod would, so yes on that. Ease of use? Yeah, it's about as easy to use as riding a bicycle (probably actually easier than that since bicycles have confusing things like gears and wheels on them just to mess with mens' minds): you slop it onto the surface, flip the switch to "brain piercingly loud shriek" and you're solid. The chime is cute, if you dig cutesie little "welcome to my shop" type of alerts but the other alarm setting is sufficient to stun a police dog or blast the eardrums of any attempted thief.

They work just fine

Product does not work. I attached it to my window just like it shows in the picture. I then tried to open the window while it was attached and the window slid right open. So I screwed the lock on tighter. The window still slid open when I tried to open it a second time. When I removed the lock I also noticed that the screw had screwed right through the rubber protector. This product does not work, do not buy it.

Did not work on my windows or a friends windows. The concept is fine. It just depends on how the tracks are designed on your windows.

Items were incredibly easy to install and after multiple tests to pull windows up, they all held well. I feel much more comfortable in my home with these in place