{PRISTINE & STURDY} The vintage crystal door knob features an Epiphyllum-shaped glass design and a sturdy zinc alloy interior. Corrosion and wear resistance ensure longevity, while the satin brass finish on the round cover adds elegance. {PRIVACY FUNCTION} Pressing the button allows the interior crystal door knob to be secured from the inside, preventing unauthorized entry. Pulling the button unlocks it from interior. To open from the outside, use the provided hex key. {STANDARD SIZE} The privacy glass door knob fit doors 1-3/8'' (35mm) to 1-3/4" (45mm) thick with an adjustable latch for 2-3/8" (60mm) or 2-3/4" (70mm) backsets. Ensure the size suits your needs before purchase. {EASY INSTALLATION} The crystal door knob with lock is designed for effortless installation, including all required accessories and detailed instructions. {SCENE APPLICATION} Suitable for bedrooms, bathrooms, guest rooms, or any area where privacy is needed, the glass doorknob is fit b