The classic design of Tylo is at home in any decor. Its style lends a graceful finish to any door. Both knobs can be locked or unlocked by a key on the outside, or turn piece on the inside. The Polished Brass finish adds to the traditional look and feel of the product and makes a classic statement. Bacteria can double every 20 minutes on an unprotected surface. Microban silver glass technology is incorporated during the manufacturing process and permanently binds the silver ions to the coating. Treated hardware continuously inhibits the growth of bacteria on the surface creating a cleaner product.