Theses are the best window lock around. They stop the top window from coming down, because it is stuck to it. And it stop the bottom window from going up. The same on sliders it stop both windows from moving from side to side. They are HD and thin (the track it self 1/8") so, it will work with a lot more windows then most. And the reviewer that said they slide with the window, they put the track up side down. Thats the only reason both would do that. You have to read, the half round end, goes away from the window, you are trying to stop. Try them, before installing them. And make sure you use the cleaning pads and dri with a rag, peel the backing off the tape and push hard all the way up and down the track. Then go outside and look to make sure it sticking good, no air, or the best you can do. Better yet don't buy them, Because they don't make them any more. And I may need more down the road.Read full review
Verified purchase: No
I Bought 2 packs of these put one on each window and there absolutely perfect they really do work great and stick to a window like you wouldn't believe I now use them in my house, boat house and my out building. Don't let there small size fool you.They really do work well and I've not had a single issue from them since institution.
Verified purchase: No
As described. Quite sturdy and easy to install with no tools. They provide me some peace of mind adding some additional security to my windows.
Verified purchase: Yes | Condition: New
Didn't work - the white locking mechanism fell (actually slid) off when the window was opened. Both of them. Worthless junk.
Verified purchase: Yes | Condition: New
Works as advertised, easy to install.
Verified purchase: Yes | Condition: New
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