The Schlage Bright Brass Single Cylinder Deadbolt with Keyed Entry Plymouth Knob is perfect for use on exterior doors, with the deadbolt adding an extra layer of security to the knob. The charming Plymouth knob is clean and adaptable. When finished in Bright Brass, the deadbolt and knob take on a warm golden sheen that adds a vintage appeal. Plus, it’s been designed and tested with strength and durability in mind.