Satin Brass Door Knobs, Rectangular Design, Privacy Function for Bedrooms Brushed Gold Door Handle: Brushed brass door knob is made of heavy-duty zinc alloy, sturdy and solid for long-lasting use. With an advanced electroplating painting technique, the brushed finish provides a textured appearance and adds a touch to your home. Privacy Keyless Door Knobs: Privacy door knobs are ideal for interior rooms where privacy is needed, such as bedrooms and bathrooms. From the inside, push the pin button to lock and turn the door knob to unlock. A hex key or any thin tool can be inserted into the release hole to open the door from the outside in case of emergency. Universal Door Knobs: Gold door knob fits doors from 1 3/8" (35mm) to 1 3/4" (45mm), with an adjustable latch from 2-3/8" (60mm) to 2-3/4" (70mm). door knob features a single-cylinder reversible design, suitable for both left and right-handed doors. Easy installation of the rectangular interior door knob set can be done using the instructions included in the package. Gold interior door knobs fit pre-existing holes perfectly and work well for both replacement and new door installations.