Prime-Line U 9819 Aluminum, Sliding Window Security Lock (4 Pack)

Very easy to install .. very good quality.. the price was great .. work perfect

One of our windows latch broke so we bought this to use as a lock for now and it works perfectly! Once screwed on they don’t budge at all.

I’ve used a similar product before in my other apartments, they worked before, & these are a bit different. I read the reviews, they seem to be sturdy, and the only issue on my one window it that I had to rearrange the angle because of how the small window is. Installation was easy. Otherwise, I think anyone can install it. I think it’s pretty easy. Thickness seems to be good, and I hope to never have to find out if they work, but from what I can see they seem like they will I mean you can always return them or if they don’t work but it’s one of the best purchases I’ve made for under five dollars

Great product, works very well and secures windows. I got it from my mother who had to put in a portable AC unit when her central air conditioner went out. She lives on the ground floor and I don't want someone to lift the window and get in. So five stars for the product which is great, but I took a star away because there was only three in the packaging. You can tell it had been open and retaped shut. So that has to do with the seller not the product

I needed a safe way to keep my windows partially open at night for a little fresh air. These work well to safely accomplish that, and they also blend in well with my window frames. I would buy these again.

The Prime-Line U 9819 Sliding Window Security Lock is a simple yet effective solution for securing sliding windows. I’ve installed these on several windows in my home, and they provide an added layer of security without the need for complicated hardware. Pros: Easy to install: Installation is straightforward and requires no tools. You just tighten the screw by hand to secure the lock in place. Sturdy and secure: Once in place, these locks hold firmly and prevent the window from being opened. It’s a great deterrent for intruders. Adjustable fit: The lock fits most standard sliding windows, whether aluminum or vinyl frames, making it versatile for different window types. Compact design: The small size of the lock means it doesn’t interfere with the appearance of the window or obstruct the view. Cons: Requires manual adjustment: You need to manually loosen and tighten the lock each time you want to open or close the window, which might be inconvenient for some. Overall, the Prime-Line U 9819 Sliding Window Security Lock is a great, budget-friendly option to increase window security. It’s durable, easy to use, and provides peace of mind knowing that your windows are more secure. Highly recommend it!

Product is cheap and not as sturdy as I wanted.

Fits some not all. May need tweaking, Crank down with pliers if needed, goal is to not be able to slide or lift from outside.

Works surprisingly good. Enough to stop anyone trying to come in.

Simple, inexpensive yet effective solution for preventing windows from being slid open. Took me just a few minutes to install all 4

Funcionan excelente! Estoy muy contento!

De muy buena calidad, muy resistentes

O produto chegou bem embalado e segura bem, cumprindo sua função. Tenho janela de vidro de correr, o tamanho ficou bom, ele só arranha um pouco devido a chave ter uma ponta afiada, mas nada muito chamativo. Recomendo.