- Home Security: Enhance your home safety with the robust 3' Stop metal door reinforcement lock. Engineered to withstand up to 800 lbs of force, this lock offers 12 times the strength of a standard deadbolt, effectively deterring forced entry and ensuring peace of mind day or night. - Easy Installation: Install the lock effortlessly within 5 minutes using a power screwdriver and drill. The included installation manual guides you through the process. Unlocking the door is quick and intuitive—simply press the upper and lower grooves of the reinforced lock and pull horizontally to open, making it accessible in any situation. - Childproof Design: Protect your loved ones with the unique child protection feature. The spring-loaded mechanism prevents children from opening the door to strangers, keeping them safe from potential dangers like streets or pools. This additional layer of security also benefits the elderly or individuals living alone, providing them with greater confidence while at home. - Versatile Compatibility: Suitable for various door types, this security lock is ideal for inward-opening apartment doors, bedroom doors, front and back doors, patio doors, and courtyard doors. Please note it is not compatible with French double doors, garage doors, doors with gaps less than 0.07 inches, outward opening doors, or misaligned door frames. - Ideal Use Scenarios: 1. Enhance the security of your front door to prevent unauthorized access while you're home or away. 2. Use it on children's doors to prevent risky outings while ensuring they are safe indoors. 3. Secure bedroom doors for added privacy and safety, especially for seniors or those living alone. Choose the 3' Stop metal door reinforcement lock for enhanced security that meets your family's needs.