Baldwin privacy knobs lock from the interior through a pin on the interior rosette, with an emergency release hole on the exterior, making them ideal for bathrooms or bedrooms where the ability to lock the door is desired, but a keyed entry is unnecessary. Solid Brass Construction: Baldwin Reserve Series products are constructed from solid brass - providing a more luxurious, higher quality feel than door hardware made with lesser metals. When you hold a Baldwin product in your hand, you will immediately notice the difference that solid brass makes – it is heavier, stronger, and smoother than most of the door hardware on the market today.