Key Locking Sash Window Jammer/Window Restrictor for UPVC Windows & Doors - Extra Security

It's hard to write a review about these really because we ordered 9 but 4 out of the 9 when they was in locked position the key wouldn't come back out. that's not good so have returned the 4 and reordered another 4 hopefully these will be ok. they are heavy and seem strong enough it's not a problem with the key but it's the lock itself that's at fault. after being broke into while we was in the house I do feel like I need window locks.

Bought two of these to put each end of our conservatory door to increase security and also help pull door in as it was warped. A year later they are still working well and do exactly what we expected. Just ordered another one to replace the original lock on the conservatory window.

A good, simple sash jammer. Seems reasonably well made and finish is good. The good thing is everything comes in the bag, the different screws and fixings, different spacers, different size contact pads etc. For the price I think these are a good choice for windows (might need something stronger for a door) and would buy more of the same if I needed similar.

OK locks, but keys are really hard to use - they can be really hard to insert, and then once inserted, you have to fiddle a lot to lock/unlock - would be catastrophic if you had to unlock this in the event of a fire

Pretty easy to install onto my patio doors and it’s very strong too. At a decent price this item is a must have!

Suited our requirements - several install options with fittings provided

key stuck in lock cant remove . not so good

Excellent product and excellent seller, I wanted this to back up my existing window lock and its brilliant.