Standard Fit & Secure Mounting: Designed for typical interior doors (1 3 / 8 " to 1 3 / 4 " thickness) using common 2 1 / 8 " hole size and fixed 2 3 / 8 " measurement Reinforced joint structure preserves door integrity for extended use Sturdy Metal Construction: Built from good metal alloy with textured / dark finish to withstand, oxidation, and daily wear, ideal for humid spaces like bathrooms Complete Set & Simple Installation: Includes unit, plate component, fasteners, and step by step guide with template Quick setup for replacements or new installations ensures door security in minutes Clear Privacy Display: Shows room condition with distinct color signals (single shade for occupied, another for unoccupied), perfect for bathrooms, bedrooms and home offices to unexpected disturbances Adjustable & User Friendly Mechanism: Spacious inner handle proposals a comfortable grip for smooth privacy control Fully reversible setup works with left / right sliding doors, folding doors, and bypass doors without needing keys, Manufacturer: HZBB