Keep Your Home Safe: The 3" door lock is designed to withstand maximum 800lbs of force for Inward Swinging Door. It helps prevent doors from being kicked in. Increasing your home security and keeping your family safe. Easy to Install: Come with 7pcs strong screw. Simply mount the door lock latch on your door frame using screwdriver or power tools. The installation takes less than 5mins. Easy to Lock Unlock: To unlock, pinch the door lock on the top and the bottom. Then slide the lock sideways along the door to the direction of the hinges until it can be pulled outward. Childproof: Security Door Lock adds extra security for children kids, prevent from opening door to strangers. Please install higher than the doorknob where your children can not reach, like top of door. Great Design: Features a spring-loaded, childproof and tamper-resistant design with smooth sand-blasting oxidation surface. High-quality aluminium material provides higher safety than traditional door locks to protects against unauthorized entry.