Wide Applicable Door Top Lock: The adjustable child proof door lock fit for the thickness of the most standard hinged interior/exterior doors and French doors between 0.8 - 2.2 inch (Please measure the thickness of your door first). Don't compatible with sliding doors(bifold doors, pocket doors), metal door frames, patio screen doors, storm doors and double doors that swing both ways.
Sturdy Metal Toddler Door Locks: The child door locks top of door is made of high-quality painted metal, rust-proof and water proof, which can last for years and will never crack or bend like cheap plastic. Use the child safety door lock for kids to lock bathrooms, older sibling's rooms, the basement and any other doors in your home.
Easy to Install: All it takes is drilling one small screw (Included) into your door frame, rest the toddler door locks on the top of door, and then slides back and forth to lock and unlock the door. (Note: If you are installing on an exterior door that opens inward into your room, please note the screw must be drilled on the exterior part of your door frame).