Mul-T-Lock Hercular Deadbolt


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Mul-T-Lock’s Single Cylinder Hercular Deadbolt is a high security deadbolt system for residential and commercial use. The Single Cylinder Deadbolt has one keyed side and a thumbturn on the reverse.  Composed of Solid brass and steel, this deadbolt has an adjustable backset for door recesses of 2 3/8” to 2 3/4”. It is also self-adjusting for doors between 1 1/2” and 2 1/2” thick. They are UL listed for use on fire doors, have ANSI Grade 1 Certification, and patent protected key control for extra security.

The security features protect against drill, wrench, ice pick, hammer, bumping, and prying attacks.

  • UL437 – pick and drill resistance
  • UL – fire rated bolt
  • Adjustable Backset for either 2 3/8″ or 2 3/4″
  • Keyway 264S