The inner door reinforcement adds extra layer of defense, making it harder for unauthorized individuals to gains entry this can be easily set up without professional assistance Great for use on various door, including exterior, interior, and apartment door, this versatile security option for different settings The features a childproof mechanism that prevents children from the door, ensuring their Make from aluminum alloy, this door security is builted to bear significant force, providing strong protections for home, Manufacturer: YOUKELAI