Ninja Lock - Any Size - Customizable

thingiverse

This device slips over the door and locks to the door stop molding, preventing children /pets from opening the door past a set distance. I use this device to allow airflow into my bedroom while preventing my cat from entering while I am away. The original design is excellent - I just wanted more sizes! I have included the Fusion360 file for even better customization. Create the perfect fit by easily changing key parameters such as door width, door thickness, width of the gap, and more. To explain the filename convention: O100T35 represents an opening of 100mm between the door and door jam, designed for a 35mm thick door. Disclaimer: I do not guarantee the safety or security of this device. Be aware that children or pets could get stuck in the opening this device creates.