The double-cylinder deadbolt from Stone Harbor is the complete package, giving you both style and security.
Function (Double-Cylinder): Double cylinder handlesets and deadbolts are operated solely by a key on both the exterior and interior. Since you will not be able to unlock this from the inside without a key, please make sure your intended usage follows the local fire code before purchasing.
Fits doors from 1-3/8 inches to 1-3/4 inches thick.
Features an adjustable backset of 2-3/8 inches or 2-3/4 inches.
