This is one of the better childproofing kits I have found. It's nice because you can't really lose the key because you can stick it to the fridge.

I used these on some really think cabinets and sometimes it was hard to unlock, once you figured out where the key had to go on the cabinets it was great. What's really nice about these too is that you don't have to take them off if you don't need to use them anymore. They have this little latch you can use to make it inactive.

There is no way that while you use the tot lock while it's in the locked position can the kids get into the cabinets. They are nice too because they are hidden and they aren't the cheap plastic kind that the kids can figure out how to get around in two seconds.

They can be a pain to install, making sure that you don't drill all the way through the doors and lining everything up but once they are on and you know when to position the key, you're good to go.