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.

I’m on a lower level apartment and like to have windows open at night. These locks fit my windows perfectly and are very durable. Highly recommend this product for extra security with windows.

Works good on windows with broken locks. You can hardly tell it's there.

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

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.

As advertised it worked great.

They work

The product works ok. Not what expected