【 Easy to Use 】 To lock or unlock , simply grip the top and bottom ends , slide the lock body away from the base along the hinge direction , then pull outward to open the door , no tools required . Built in anti pry locking mechanism only allows locking from the interior , adding an extra security barrier against intruders 【 Home Security and Child Safety 】 This home security door lock provides an extra layer of protection for young children in the home . The internal spring mechanism avoids young kids from opening the door and encountering strangers . It brings peace of mind to children , seniors and women living alone 【 Easy to Install 】 Select a proper mounting position and ensure the lock engages when the door closes . Mark holes for the lock and screws . Pre drill holes with an electric drill , then fasten the lock to the door frame with the included screws 【 Fits Only Inward Swinging Doors 】 This home security door reinforcement lock is exclusively designed for inward opening doors . Not compatible with outward swinging doors , sliding doors , double doors , screen doors or French glass doors . A minimum 0.2 inch (5 mm) gap between door slab and frame is required for base installation and smooth door closing 【 Upgraded Reinforced Security Structure 】 This door reinforcement lock is made of premium aluminum alloy , capable of withstanding up to 800 lbs impact force . Its anti kick resistance is 12 to 16 times stronger than standard deadbolts . Install one set for entry doors , bedroom doors and back doors to avoid unauthorised entry and protect your home safety and personal privacy, Manufacturer: Zhjiutak