Single Cylinder (598) - is operated with a key from the exterior and a thumbturn from the interior.
(Sngl. Cyl. - SMT) - Smart Key Cylinder with Bumpguard.
Double Cylinder (599) - 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.