Adjustable Window Security Bar, Sliding Door Safety Lock, Sliding Glass Door Security Bar & Child Safety Lock, Works Great with Window Alarms for Home Protection – King Size – (2 Devices)

This is an extraordinary item, something that I did not even know existed until I accidentally found it on Amazon. The window shown in the picture has a broken piece of hardware that cannot be replaced. A new window seemed the only option. Lock it Block It is the perfect solution. Clear directions, easy to use, perfect fit, and an added bonus of additional security. I am VERY PLEASED!

This is exactly what I needed to keep my window locked with my air conditioner! Works great!

These are very easy to install once you get the paper off the Velcro. So far only one had fallen off with the Velcro coming off as well.

Why did you pick this product vs others?:I feel more secure when I have these on the window w my portable AC. Sturdy, multiple settings.

I purchased this as I love having my windows open during the day, and night, but where I am renting they don't have locks that allow you to only open it a few inches. I wanted to be able to leave them open while still feeling safe. These are everything I could have asked for and more. I was worried about a few of the reviews saying the sticky tape wore down and it rendered them useless, but what I think they did was only use one of the tapes given. You need to use all of the tape - three for each item! They will NOT move at all once you do that. I've been able to have my windows open throughout the day and night, get some fresh air blowing through, without the worry of someone breaking in. I didn't really want to spend the money initially, but these are well worth the price. Piece of mind is priceless, safety is priceless. This company seems to be high quality and I'm thankful for my purchase. 10/10!

I ordered this for 2 sets sliding doors. First impression is they are kind of small and flimsy for a heavy sliding door. They also are not long enough on the longest setting... so there is a couple inches that the door would still be able to slide open. This really defeats the purpose because then you could reach in possibly get the door open. I don't know why it doesn't reach either... these are normal sliding door width in my opinion. They are also plastic construction so not that heavy duty when it comes to security. It gets the job done for me because im using them so a toddler can't open the door..but for a forced entry i would look elsewhere.

Work great

This is my first review forever. I am an Amazon prime customer and bought many things without shipping I need over the years, only return things we can’t use or not satisfied.I paid $15 for shipping when I placed this order and it had four items in one box, although I only need one when I placed the order because the video is showing they are useful and I thought I can use the rest three in the future.The adhesive came with 9 in a sheet, the instructions said to put three on each, which is short of 3, also the adhesive is not working well and I had to put one extra and thought to make it sturdy, after days on the window, it kept moving and I really don’t like it, I decided to return it and I had to pay $8 ish for shipping again, this is insane but I am still returning the order.I will never buy anything from this company again.