1.Privacy Door Handle: This door handle has a privacy function. You can enter from outside without a key, while it can be locked from inside, providing you with both easy access and privacy space. If the interior is locked in an emergency case, you can use a flat object, such as a coin, put it into the groove and rotate it to open the door. Ideal for bedrooms and bathrooms. 2.Worry-Free Quality: Each door knob is carefully inspected before . Made of high-quality zinc alloy and with rigorous craftsmanship, this door knob is not only sturdy and durable, but also waterproof and rust-, making it perfect for daily use. In addition, our door knobs are a tight fit when aligned, so you don't have to worry about noise impact. 3.Unique Design: This door knob has a satin brass finish, which is simple and elegant, making it perfect for modern-style room doors. In addition, compared to the sharp lines of ordinary door handles, this door handle has smooth and rounded edges, so you don't have to worry about accidental scratches, which is perfect for families with elderly people and children. 4.Simple Operation: No need to worry about installation. Our door handles can be easily installed with just a screwdriver. They fit doors from 1 3/8 inch (35 mm) to 1 3/4 inch (45 mm) thick, and the door latch can be adjusted between 2 3/8 inches (60 mm) - 2 3/4 inches (70 mm) from the edge. Each package comes with an installation guide, please read it carefully before you install.