Features:

  • EACH PACK INCLUDES – (1) Adjustable jaw that fits all vinyl frame rail thicknesses from 1/16" up to 1/2 in. thick. "Vise like" grip holds securely and will not mar frame. Allows window to lock in ventilating position; cam style locking lever; no tools required. This is for Vinyl Windows only.
  • SECURELY LOCK WINDOWS – These U 9809 sliding window locks for vinyl windows help keep them securely closed. The locks feature an adjustable jaw that has a “vise-like” grip, and they are capable of opening up to ½” wide.
  • ADD EXTRA SECURITY – Use these sliding window locks to prevent unwanted intruders and avoid falling accidents –keeping your windows closed when you want them the most secure! Air and a breeze can get in, but no intruders.
  • FOR USE ON MOST VINYL WINDOWS – These sliding window locks are for use on horizontal sliding windows and most vertical sliding (single hung) windows as a secondary window lock.
  • PRODUCT INFO – These sliding window locks have a diecast construction with a white painted finish and can fit most vinyl frame rail thicknesses ranging from 1/16” to ½”.
Work Fantastic!

These are great! They easily fit into the window channel, install in just seconds and are of a solid metal construction. These are extremely secure on my windows. An intruder would just have to break the window to get past these. Would definitely recommend.

Work perfectly.

I purchased these so I can leave my apartment and keep the windows cracked open without having to worry about someone breaking in (easily) at least. When I crank on down, I can still open the window although it is difficult. With two on one window, the window doesn't move. I also recently purchased a window air conditioner. The unit came with hardware to screw into the frame to keep the window from going up. Since I live in an apartment, I decided to use these instead to insure I make as few holes as possible. Because it is a big unit(15,000 btu) I decided to put 4 on this window (can you really use to many of these?) and the window has not budged at all. Theses window locks are a small price to pay for peace of mind.

PVC window lock

Excellent product. You only need one per window unless it's an unusually large. For most windows that are three feet by four feet or less only one lock is necessary to secure the window from sliding open while in the closed position. For open windows you need two locks to properly secure the open window.. This device has five pointed spikes that grab into the window pane as you screw the device into the closed position then press the latch to secure the lock into place If you want to open the window simply unlatch the device and loosen the lock and slide it to the position you want the window to open to. You can open and close this window lock as many times as you please without effecting the device. Prime-Line Products U 9809 Sliding Window Lock, 1/2 in., Diecast Construction, White, FOR VINYL WINDOWS (Pack of 2)There are no cons to the device what so ever.

Excellent security for my windows

I purchased these in conjunction with another product that I attempted to use for my patio sliding door (THAT product was a virtual failure). These worked just as I was expecting. They grip tightly, but do require a bit of finesse to get the right grip ... not to loose, not too tight (to break or damage the vinyl). Using two (which is the recommendation for best security) of them on my sliding door, it was practically impossible to move. I will now be able to take the unsightly cut metal rods out of the door track, to my wife's pleasure. These are an excellent value. And, what is not entirely made clear in the description, there ARE TWO per package. I have added a photo of the ones I received.

Works great, feel much more secure

The only option for an intruder appears to be break the window or move on. If a burglar decides to break a window to get in then they would have found their way in regardless. This gives good peace of mind as a deterrent.

Feels secure

So I am the type of person that likes scary movies and reading about interesting creepy and supernatural moments that people have had. After hearing one particular story involving someone at home and things happening through a window...I immediately ordered these along with the suction cup window security things. I will definitely say the suction cups can definitely be forced away but these aren't going anywhere. The only way these could be moved would be someone using so much force, they'd have to snap the frame these are attached to and create enough noise to wake someone up. So if you want to not be afraid or paranoid of someone climbing through your window, either don't have kids, don't watch scary movies/videos/use Reddit, or just order a set of these!

Nice Locks with a sleek design!

Better than putting bars on windows since bars cannot be removed in case of emergency/fire. I feel so much safer going to sleep and knowing my kids will be there in the morning and no one can get in. I have purchased several more at this point. Here is some helpful info: I use them on double-hung windows myself. So, if you look at the picture of the little lock, you can see a square on top, a turning knob up front, and tucked behind is a piece that moves forward and backward. You take the lock and open that sliding portion by turning the knob. You open it up big enough to slide the "teeth" of the lock onto the window frame. (See pics) This can attach to any frame as long as the frame is thin enough to fit in the teeth. The teeth open about 1/2", so if the frame you want to attach to is 1/2" thick or thinner/smaller, then you are good to go. Slide it onto the frame (see pic) and turn knob to tighten. Once you have it good and tight, you push the knob flat and that will secure it even more. Note - make sure to use BOTH locks on a single window. In testing, I placed one lock in a way that it would allow the window to open 3-5 inches. I then "pretended" I was trying to get in and took the window from the bottom and shoved it up pretty hard. I did this a few times, and there is enough wiggle by going up and down with the window that I can slowly, but loudly, get the lock to inch up until there is enough room for me to climb into the window. However, it is really hard to do that when BOTH locks are used on either side of the window. Having two in place is a pretty secure situation. I also like that I don't have to screw these into anything, which not only damages the window frame but also allows for only one position. These allow you to move them up and down at anytime, or just remove them. Meaning, you can place them in a way to allow the window to open 3" or 4" or almost all the way open, or almost all the way closed, wherever you want, and you can change it from day to day if you like. Nothing permanent. I love these!

Must-have for window AC units

I researched this a lot and wasn't sure if these would fit. The new windows are metal and have a thick frame and there's a bar running up vertically on the inside that the lock also had to clear. (See photo). I added a bit of rubber (black) to protect the window frame and minimize any possibility of slippage (I'm on the top floor. A falling AC unit would kill someone.) I put two on each window. They hold the sash down tight on both AC units.

Better than putting bars on windows since bars cannot be ...

I put these on the bedroom windows in my kids' rooms. I put 2 on each window (1 on each side). I leave about 3 inches so air can flow, but no one can get in. Better than putting bars on windows since bars cannot be removed in case of emergency/fire. I feel so much safer going to sleep and knowing my kids will be there in the morning and no one can get in. I have purchased several more at this point. Here is some helpful info: I use them on double-hung windows myself. So, if you look at the picture of the little lock, you can see a square on top, a turning knob up front, and tucked behind is a piece that moves forward and backward. You take the lock and open that sliding portion by turning the knob. You open it up big enough to slide the "teeth" of the lock onto the window frame. (See pics) This can attach to any frame as long as the frame is thin enough to fit in the teeth. The teeth open about 1/2", so if the frame you want to attach to is 1/2" thick or thinner/smaller, then you are good to go. Slide it onto the frame (see pic) and turn knob to tighten. Once you have it good and tight, you push the knob flat and that will secure it even more. Note - make sure to use BOTH locks on a single window. In testing, I placed one lock in a way that it would allow the window to open 3-5 inches. I then "pretended" I was trying to get in and took the window from the bottom and shoved it up pretty hard. I did this a few times, and there is enough wiggle by going up and down with the window that I can slowly, but loudly, get the lock to inch up until there is enough room for me to climb into the window. However, it is really hard to do that when BOTH locks are used on either side of the window. Having two in place is a pretty secure situation. I also like that I don't have to screw these into anything, which not only damages the window frame but also allows for only one position. These allow you to move them up and down at anytime, or just remove them. Meaning, you can place them in a way to allow the window to open 3" or 4" or almost all the way open, or almost all the way closed, wherever you want, and you can change it from day to day if you like. Nothing permanent. I love these! Sorry about some of the pics. Amazon would not allow me to flip a couple of them. Hope it still helps.

Work great, simple, and unobtrusive

Yes!! These work, hurray! After trying several other options, we're ecstatic to find these subtle (i.e., practically invisible) locks that solved our problem. Which is---that our dog is too smart. Our dog Chase does not like being left alone, and he seems to have a mission to get out of the house and find us, whenever he is. He started jumping out of our front windows, busting screens out. So we made sure the windows were latched. But he learned to climb up on the sofa in front of the windows and use his mouth to grip and open the latch, open the window, and jump out. So we moved the sofa. He still did it. So we purchased locking bars, made them as tight as we could, and jammed them into the frame. I don't know how, because they were hard for me, a thumb-owning human to get out, but he managed it. These window locks truly seem to require thumbs and know-how that are so far beyond Chase's abilities to open, although there are scratch and bit marks on them to show his attempts. We're truly relieved!

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