Mul-T-Lock Hercular Deadbolt – Cylinder Single (Grade 1)

Mul-T-Lock’s High Security Hercular® Grade 1 Deadbolt has a robust and unique design that is reinforced in just about every possible way to offer the best deadbolt protection available. Featuring hardened steel inserts and parts reinforced with some of the strongest-available materials, as well as a unique interlocking ball bearing mechanism which locks the bolt into the door frame, the Hercular® deadbolt provides top protection against tampering, prying, drilling, kicking and more.


  • UL Fire Rated, ANSI Grade 1 Deadbolt
  • Available with MT5+ or Interactive High Security keyways
  • Adjustable Backset – 2-3/8” (60Mm) Or 2-3/4” (70Mm)
  • Multiple finishes (colors) to match any decor
  • Also available with Double cylinders (Key operated from inside)
  • Many Keying options available (Alike, Different, Master-keyed, 3 in 1 and more)
  • UL437 Listed for Pick and Drill Resistance
  • Full 1” (25Mm) Bolt Throw with Anti-Pulling Ball Bearings Mechanism
  • Locking Mechanism Reinforced with Hardened Steel Pins
  • Free Spinning Solid Brass Core Rosettes