Sliding Window Locks (6 Sets), Security Window Locks with Keys, Adjustable Aluminum Sliding Window Stops, Easy Installation Without Drilling, for Vertical and Horizontal Sliding Windows (Silver)

I took measurements first to make sure they fit. Attached them on the same day of arrival. They seem sturdy and were easy to attach. Bought them after a neighbor's cat fell out of their window in the eighth floor and died despite a fly screen being attached. I live even higher up. Just want to make sure neither a guest nor maintenance will ever open my windows further than a kitty can get through.

It lets you keep your windows open at night without the fear that they can be opened from the outside

It is extremely durable and works exceptionally well with windows.

The hex key didn’t work with my windows so I had to use the vertical one. Love the thickness. I felt I was able to tighten them more than the old school butterfly bolted locks. Bought these because my toddler likes to climb out windows, so here’s to hoping these works since he can’t take them off.

Work fine thank you

I love this fits perfect on the window. Fits on sliding door as well. Comes with a key to each lock.

This is useful and easy to use.

I purchased these bc they had a good price and we need a few more to secure our windows. Unfortunately, these are much larger than the previous ones we purchase so, I will be returning these to keep the look uniform and the smaller profile. From what I can tell the quality looked good and thex can get the job done.