Bests & Worsts Reviews from Amazon

First, this won't keep anyone but your grandma out. The adhesive is strong, but I wouldn't rely on it (vs a solid bar along the floor) if you are really worried about someone forcing their way in (in reality, crooks will just smash your sliders or pop them out of the tracks). HOWEVER! I am 100% sold on these as child locks for your sliders. I have them on all my sliders and the grandparents sliders. Place them in the top corner, and no short kid (except the most clever ones) will be able to sneak out. UPDATE: I have seen these installed incorrectly in other reviews. 1. You must install them horizontally, not vertically! 2. I place mine in the top corner while the lock part is up (L-shaped) so I can ensure placement is optimal. I also place them with the moving portion on the bottom (i.e., push leg up to activate lock, down flat to deactivate). 3. Place them as close as you can get them to the door that opens (like <1mm) without blocking the bracket. If these are going to have a chance at preventing entry, you can't allow the door to gain momentum.