Using Space and Depth Keys

Locksmiths use space keys and depth keys as essential tools for creating or duplicating keys, particularly when they need to originate a key without having an existing one to copy. Here’s how they work:

Space Keys

• Purpose: Space keys help define the spacing of the cuts on a key blank.
• Function: They ensure that the cuts (or notches) are made at the correct positions along the key blade to match the pin tumbler arrangement of the lock.
• Usage: Locksmiths use space keys to ensure consistent, precise alignment when cutting a key.

Depth Keys

• Purpose: Depth keys determine the depth of each cut on a key.
• Function: They correspond to the specific heights of the lock pins, ensuring the key aligns with the lock's internal mechanism.
• Usage: A locksmith uses a set of depth keys as a reference to cut the correct depths for each position on the key blade.

Combined Use

Locksmiths use space and depth keys together to create a new key that accurately fits a lock. By combining the specific spacing (horizontal position) and depth (vertical position) of each cut, they can craft a functioning key without needing the original.

These tools are particularly useful when originating keys based on manufacturer specifications or "code cutting," which involves creating a key based on the lock's pin code rather than duplicating an existing key.