Single Cylinder (158) - is operated with a key from the exterior and a thumbturn from the interior. (Sngl. Cyl.- SMT) - Smart Key Cylinder with Bumpguard.
Double Cylinder (159) - is operated with a key from both the exterior and interior. (Dbl. Cyl. - SMT) - Smart Key Cylinder with Bumpguard.
Select preferred finish (4 finishes available) and function (2 functions available) to view detailed product information.