Review on Burglabar 2 Pack - Ultimate Sliding Patio Door and Window Locks for Enhanced Security and Child Safety by Kevin Apriando

Works great! Easy to install, efficient and easy to use. The only bad reviews I've seen are people who don't read the instructions and it shows in their photos of the broken product. If you install them correctly, they work great! I have recommended them to several others. It must be installed so that it tilts UP TO DOWN, not side to side. A little background: we have a slider that we previously hacked by making it wiggle/bounce off the track and over the bar on the ground. After that we got one of the thumb tight twists to install the metal locks that attach to the top rail. It works great, but it's impractical, so it mostly stopped, which robbed it of purpose. Stumbled across them, ordered, arrived within days, they're clean so not as ugly as a block of wood or metal. one piece. They can be installed in different places, so you can lock the door in a specific place (if you have a cat flap or air conditioner) and not just closed. I highly recommend it. Just remember to set them up so they are upside down, not side to side.