Home Security & Toddler Protection: Swing bar door locks are safety locking devices for swinging doors, allowing people inside the room to open the door a few inches for identification or ventilation while providing privacy and security for guests and residents. Door latches can also be installed out of reach of children so they cannot open the door by themselves, providing additional child safety. NOTICE: Compatible with most wood doors and moldings when the door is flush with the door jamb! Durable Construction: The door latches are made from premium solid aluminum alloy with a beautiful polish and finish to complement your lovely decor. The door locks are difficult to rust or oxidize and will last longer. The ultra-thick swing arm and solid locking base ensure strong and durable quality and withstand a force of up to 600 lbs. The home security door lock can be easily unlocked from the inside with a simple swinging motion, while being too strong to be forced from the outside. Advanced Craftsmanship Features: The home security door lock features a steel ball positioning, which is a unique locking design that keeps the locking arm in place so they don't swing for added security. The cool hole design makes the security lock noble and elegant. Easy Installation: The door reinforcement lock has a long swing bar that folds over the closed door. Installation is quick and easy with the screws in the package, the process is simple enough that almost any homeowner can easily do it in minutes.