Shop Square Window Locks, 4 Pack Aluminum Thumb Turn Window Lock, Secure Sliding Windows & Doors, No-Drill Install, Child Proof, Indoor Outdoor, Requires 28-36mm Clearance

These are fantastic!! I installed two on each window. They are super easy, fast, effective, and affordable!They lay flush against the pane, and the rubber gripper allows for a seal creating a firm secure hold without destroying or marring the integrity of your casing. They fit precisely. They are discreet in size, and will not pop off the casement. They are engineered with that in mind, as they are positioned on the INSIDE of the casement.TIPS:1. Use two locks -- one on each side of the casement. Make sure to position them flush against the pane.2. Remove the rubber lining for ease of initial placement. Slip the lock onto the casement. From the top slide the rubber lining back into place.3. Secure the screws by hand and then tighten using a pair of pliers. You will be amazed at how many more rotations you can achieve, and how tight they become.When used with your casement lock you are afforded an impenetrable window when installed correctly. These will NOT allow your window to open affording optimal security.HIGHLY RECOMMEND!!

My apartment windows did not include locks and since I am on the bottom floor, I desperately needed to find a solution. I found these and they do not budge when I try to open my windows. I love the extra peace of mind these provide to me.

I needed to replace an aluminum window lock (at least 20 or more years old) as one of the thumb screws does not tighten as it just spins. I purchased Shop Square, but my original is still manufactured better. My lock has a thick rubber insert and this one is a thin plastic (?) insert that slides back and forth easily or falls out. Original is a sturdier aluminum with larger thumb screws. Although Shop Square window locks work as intended.

These work well an are easy to install. In my case, the rubber made it a little too narrow to fit on my window frame, but no problem installing with the rubber removed.

Great quality window locks.

I put these on all of my windows. I feel they are my first line of defense in home security. The window can only be opened 6-7 inches, but they are easy to remove from the inside if I needed to get out quickly. They would be good to keep young children from opening a window too far, but older children could easily remove them.

Too small for an average newer window.Maybe they fit older windows?

For the price of these 10 window locks you can't go wrong with this product. I've seen similar products that proclaim similar features but are smaller in size, only have one screw for security and come with a fewer number of actual locks in the package. Installation is pretty self explanatory, straight forward and simple to complete. The product is constructed of all aluminum that feels sturdy with a foam strip of cushion along the edge wear it contacts your window. The design is simple and easy to understand. Once in place and securely tightened they effectively prevent the window from being raised past your specified height or not raised at all. They are as easy to remove as they are to install, simply unscrew the fasteners and remove from the window track. I installed one on every window in my house, even on my windows with locks that were still functional just for added security and peace of mind. Shop around and look at all the different choices but rest assured you can't go wrong with this product if you want a simple solution.

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Me encantaron , fácil de instalar y su uso súper!! Muy recomendables 👍🏼👏🏻👏🏻

Very good windows/door lock, easy to use, with rubber to protect the window frame from any scratches! Please see the video FYR

Good for extra security

Easy to use, works perfectly