2PCS Window Locks for UPVC Windows, Window Restrictor Security Locks with Keys, Window Safety Locks for Window Security and Child Safety, Easy to Install

Delivered quickly. Looks ok with plastic covers on, however the locking system is very loose and the key is difficult to turn and lock. Infact the key snapped in the lock but fortunately i had managed to lock the system before it snapped off.

The locks themselves are very good. But the keys are ridiculous. I've had 2 lots of these locks and every key has snapped in the lock as they are not strong enough.I messaged the seller asking to buy replacement keys to be told I'd have to buy a new set.Not happy and will not buy again.

Really like these locks easy to install leaves a big enough gap to get air in and keeps little ones from opening the window will be buying of these for rest of the house

They work a treat! Initially I was going to use them both for the same window for extra security, but ended up using only the one, and still gives me a good piece of mind with my 3 year old always playing up near the window. The first few times I completely forgot it was there, and when I decided to let some air in, gave it a strong push, my fingers almost broke...but not the lock, so it's a good thing, and reassured me, it is safe enough for a toddler.

We can now leave the window open knowing that it won't fly in if windy. Easy to fit. The only negative, as others have mentioned, the white covers either end do not clip on properly - I had to use a small amount of white silicone to keep them in place.

Used for velux windows to avoid children opening too wide, does the job perfect the window only opens enough to allow fresh air in

Good for what you pay, however the plastic cover plate doesn’t stay in place on the receiver.

Great product, sturdy and durable. Easy to install and excellent quality. Great replacement for the plastic one's that I had previously.