A Standard Key for lock cylinders is a metal key with a specific set of grooves and cuts that match the internal pins of the lock. When inserted, it aligns the pins to the correct height, allowing the cylinder to turn and unlock. It ensures only the correct key can operate the lock.
A Neuter Bow Do Not Duplicate (DND) Key is a type of key with a distinctive bow (handle) stamped with “Do Not Duplicate.” This designation indicates that unauthorized copying is discouraged. However, the difficulty in duplicating such keys arises primarily from ethical compliance, as most professional locksmiths and key-cutting services honor this request to prevent unauthorized access. Despite this, physical duplication remains technically possible if an individual finds a willing or unregulated key-cutter.
A Small Format Interchangeable Core (SFIC) Key is designed for locks with interchangeable cores, commonly used in commercial settings. These keys fit into a lock core that can be easily swapped out without disassembling the lock. SFIC systems use master keys, change keys, and control keys to manage access.
Difficulties in Duplication:
- Key Control Systems: SFIC keys are often part of a managed key control system, where key blanks are restricted and tracked.
- Specialized Blanks: They require specific key blanks not readily available to the public.
- Professional Ethics: Locksmiths typically require proof of authorization before duplicating these keys.
- Manufacturer Restrictions: Some manufacturers place legal restrictions on the duplication of their key blanks and require authorized dealers for key cutting.