With its truly unique design the MUL-T-LOCK Hercular deadbolt is truly spectacular. The Hercular is reinforced in just about every way possible. From a UL437 Listed Cylinder, to strong latch, to Bolt Bearing Mechanism, the Hercular Deadbolt will stop almost any attempt at forced entry. Strength usually does not mix with Flexibility. Not in the case of the Hercular, since it is the only Grade 1 Deadlock with an adjustable backset. This makes the Hercular deadbolt a true high security lock that exceeds all high security standards.

This is a Double Cylinder Captive Key (Key on both the inside and outside with removable thumb turn inside) Deadbolt. The captive key feature allows this deadbolt to function as a single cylinder lock with a removable inside thumb turn. Available in 7 different finishes.

Also available:
Single Cylinder Deadbolt - Double Cylinder Deadbolt

Features:

• Removable Thumb-Turn Piece
• Conversion from Single Sided to Double Sided
• ANSI Grade 1 Locking Mechanism
• UL Fire Rated Latch
• Adjustable Backset (2 3/8", 2 3/4")
• UL437 Drill and Pick Resistance Cylinder
• MUL-T-LOCK's Patented Interactive Key Control System
• Limited Lifetime Mechanical Warranty

Fit doors 1 1/2" to 2 1/2" thick. If your door is 1 3/8" thick you must add an Extension Ring below. For doors 2 5/8" to 3 1/4" thick you must add a Thick Door Kit below.