This is a remix of @DC_53232's Child Proofing Cabinet Lock.

I rebuilt this model making some changes along the way to fit my cabinets. Most notably, the screws have been moved to the bottom and the top of the model ends at the latch, allowing the doors to shut all of the way. I also made the back thicker so that the screws I have wouldn't be poking out the front of the cabinet door. 

I have only tested the latch for a short time, but it seems to hold up well. Printed in PLA, I wouldn't expect it to withstand heavy long-term use. I would consider printing this in PETG or stronger material if that is needed. 

Please be aware: I can not accept any responsibility if your children are able to access your cabinets with this device installed. You should not rely on this device alone and children should always be supervised.

With this being a 3D printed part and various styles of cabinet and mounting options, your results may vary.