Passage Function: Passage door hardware has no locking mechanism. Both the interior and exterior handles are always free making it perfect for hallways, closet doors, and anywhere else a lock isn't needed. Passage door hardware can also be used in conjunction with a deadbolt to secure a back door or entrance. Features: Solid brass construction offers a substantial feel and durability Finished and polished by hand by skilled artisans Latches are constructed for exceptional durability and smooth operation Designed for quick and easy installation Features a concealed mounting system with no fasteners visible to accumulate dirt and debris Baldwin products feature the highest and craftsmanship that has been respected for generations Limited mechanical and 25 year limited finish Product Technologies: Solid Forged Brass Construction: All Baldwin hardware begins with raw bars of solid brass which are heated, and pounded into specially made dies—producing a stronger, more substantial product. The difference between lesser metals and heat forged brass is noticeable the minute you hold it in your hands—solid brass is heavier, smoother, and naturally resists corrosion. Finishes™: Baldwin's multi-patented Finishes™ provide unprecedented protection against the effects of weather, normal wear and tear, and even the rigorous test of coastal salt air. By adapting the vapor deposition processed used to create premium gold pens, Baldwin creates a unique surface across your door hardware that is guaranteed to withstand the ravages of time. Living Finishes: Baldwin Living Finishes, which include Non-Lacquered Brass, Vintage Brass, Oil Rubbed Bronze, and Distressed Oil Rubbed Bronze, are designed to mimic the patina of a well-loved piece of vintage hardware, and as such will change and adapt over time naturally