One of the two came defective because the lock / unlock safety mechanism gets stuck and does not allow the "tongue" to lift. The installation was not very easy but with a little extra effort, the ones that worked properly were placed correctly.

If you can place it, let me know. I watched all the videos, made 100 attempts, and nothing! Also, I think I received a defective one, the magnet doesn't work properly. Unfortunately, I was late to put them on and I can't even return them!

Very easy to use. We didn't even need to drill the drawer. We stuck it with the special stickers included in the package and it works great! Although the thickness of the drawer is quite large, the magnet works perfectly!