Onvian Window Locks, 6 Pack Aluminum Sliding Window Locks Security, Adjustable Sliding Door Frame Security Lock with Keys

Easy to use and well made. We needed something to provide a little extra security on our upstairs windows. Love the fact that these aren't thumbscrews and instead had a key to tighten it. That means that our kids won't just unscrew them like the other ones we purchased. The clear plastic piece to protect your window from the screw pressure is also a little longer than the actual piece. That makes it easy for you to hold while screwing in, instead of wondering if it is centered properly.

Was very easy to install. Works great to secure my window.

Super sturdy love it!! Very secure for child proofing for my 10 mo old. Only reason I gave 4 stars is the pieces of metal came very scratched up but don't mind because it's so effective and will withstand any baby or toddlers tugging at the windows

Great price, received within a few days, quick and easy to install and because it’s metal and not plastic it can’t be broken...adding an additional level of security to my home! I didn’t purchase enough... I want them on all my windows Thank you...

The idea of these locks is good, but the design needs some reconsideration. In many cases, there won't be enough space to insert the key to turn the locks screw. having a shorter key would certainly help. I had to buy other models to work in y case

Bought these to secure my window when I have the air conditioner exhaust installed during the summer. They work well and are easy to install. They will mark your window frame if you don't use the protection pads. I opted to not use the pads and am okay with it since it's a more secure fit.

Ordered these window locks as I have small children. These are GREAT - super easy and fast to install, very secure and 2 keys will be good to have on hand. Will be ordering more from this company - recommend for window locks.

These things are tough. Using the little plastic flat pieces that were included keeps these locks from budging one bit once on the window frames. I am very happy with these, love the added security! I was glad to find out that Allen Wrenches will work to screw and unscrew these as only 2 keys were included and there are many more locks than that. I was concerned about being able to open the windows quickly from inside in case of fire with no way to remove these locks without the key. Now I have an Allen Wrench or a key in every room I have these locks.

Liked the quality and variety of sizes to secure a kitchen window.

Does not fit every window...but when it does fit your window, it works like a charm. Super easy to install and it does its job of locking your window. My window is very easy access and this lock provides me with extra peace of mind.

great buy and easy to use fast shipping too.

It’s of good quality but doesn’t not grip vinyl window lips well. Even cranked on hard a sliding window can cause it to slide.

works great as a child lock on my kids window. The double screw is tough enough I can't push open the windows ive put them on. Super easy install and low profile so you don't even notice them once they're on