Review on 4 Pack Sliding Glass Door Child Lock - Sliding Window Security Bar Locks for Baby Safety Proofing Patio Closet Doors - Easy Installation, No Drilling Required by Vettee Welch

My fault I haven't tested them but they don't work on my sliding glass doors. The area they need to be attached to on each side is not flat or wide enough on my doors. We installed it temporarily to see how it performs and to be honest it still works, but because it has less surface area to stick on it probably won't heat as well for a long time. Poor metering abilities aside, they are very well made and very easy to install and use! If your door fits, I would unreservedly recommend it.