Weiser Safe Lock was designed with one idea in mind: to provide you with quality, reliability and security. With a clever mix of styles and finishes, you’re sure to leave the overall impression families want. The ideal starter set designed to leave a lasting impression.For use on exterior doors where key locking and security are requiredIncludes adjustable latch compatible with all standard door preparationsThe locking mechanism works thanks to the tab on the inside of the lockEasily installs in just a few minutes using a simple screwdriver