The Captive Key functions as a hybrid of a Single Cylinder, and Double Cylinder Deadbolt.

The inside part of the Hecular incorporates two cylinders. When the user wants the Hercular to act as a Single Cylinder Deadbolt they will insert a special key with a thumbturn attached to it, into the central cylinder. There is a piece inside which locks the thumbturn into the lock itself. This way it will give the user the safety of being able exit the door without having to search for a key.

When the user would like to convert the Hercular into a Double Cylinder application, they will simply insert their normal key into the other cylinder on the inside portion of the Hercular, turn, and the thumbturn key will be removed. This will make the Hercular into a Double Cylinder Deadbolt, and give the user the security of Double Sided Locking.
Other product views

Details
 

• Removable Thumb-Turn Piece
• Conversion from Single Sided to Double Sided
• ANSI Grade 1 Locking Mechanism
• UL Fire Rated Latch
• UL437 Drill and Pick Resistance Cylinder
• Bump Proof High Security Lock Cylinder
• MUL-T-LOCK's Key Control System
• Limited Lifetime Mechanical Warranty???
• Backset: Adjustable (2-3/8" to 2-3/4")
• Cylinder Plug & Bolt Finish: Bright Brass or Satin Chrome.

• Includes: Keys (check keying options below) and Key Order Card

Call us today at 416 736-8383