Marks Surface-Mounted Lock with Cylinder and Knob

This image features a Marks surface-mounted lock with a brass knob and key cylinder. This lock style is commonly found on gated entries, apartment doors, and multi-unit residential properties. Rekeying Marks locks allows property managers and homeowners to change who has access while keeping the original hardware in place. These locks are well-suited for controlled access setups where hardware durability and rekeyability are priorities.