Just put these on our bathroom and kitchen cupboards. The design is pretty crappy - the sliding part is too deep so it doesn't fit under a standard knob all the way. This means you can't slide it snug enough to hold the knobs together very securely. My one year old is now drawn to the cupboards that have them and likes to rattle the doors because it doesn't hold them tightly shut. I foresee him being able to open them before long. Also, the plastic is kind of sharp and has pointy ends, so I'm worried about him scratching himself on them. Not impressed.