1.Aluminum Alloy 2.Imported 3.[High quality material]The door closers are made from high quality solid Zinc alloy with a beautiful polish and finish to complement your home décor. 4.[Upgrade Security Design]3' Stop metal construction home security door lock with 4 screws designed to withstand 800Ibs of force, 12 times stronger than a normal deadbolt to against being kicked in. 5.[Easy To Install]Use the enclosed screws to easily install this door lock to the door frame. Installation is quick and easy, the process is simple enough that almost any homeowner can easily do it in minutes. 6.[Easy To Use]Place index finger on top of door lock security and thumb on bottom and slide lock away from the base plate along with the door in the direction of the hinges then pull outward. No tools are required to open, just a little practice. This door guard prevents breaking in but is easy to open in case of emergency.