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Satin chrome double cylinder deadbolt with keyways on both sides, solid brass and steel construction

Mul-T-Lock

Mul-T-Lock HD2-26 Satin Chrome Hercular Double Cylinder Deadbolt

SKU CH-1GXY-TX3RV

A high-security double cylinder deadbolt with key access on both sides, ANSI Grade 1 certification, adjustable backset, and UL 437 drill and pick resistance

  • FinishBright Brass
  • Selling UnitBox
  • TypeDeadbolts
  • Security LevelHeavy Duty
  • Grade1
  • Highest ANSI Grade 1 certification for maximum residential security
  • Double cylinder requires a key on both sides for controlled access
  • Patented key control system prevents unauthorised duplication
  • UL 437 listed cylinder resists drilling and picking attacks
  • Adjustable backset fits standard door preparations from 2-3/8 to 2-3/4 inches

High-security double cylinder deadbolt

The Mul-T-Lock HD2-26 satin chrome Hercular deadbolt provides keyed entry on both sides for residential and commercial doors. It uses a solid brass and steel construction with an ANSI Grade 1 locking mechanism. The cylinder carries UL437 drill and pick resistance certification. Two keys and a key ID card are included for controlled duplication.

Replaces single-cylinder or lower-grade deadbolts

This unit upgrades doors that currently use a single-sided cylinder or hardware rated below Grade 1. The adjustable backset fits recesses from 2 3/8 to 2 3/4 inches without modification. The jump is worth it when key control and double-sided locking are required for fire-rated openings or high-traffic entrances. Patent-protected keyways prevent unauthorised copying.

Sustained resistance to physical attack

The Hercular cylinder maintains integrity under prolonged drill, wrench, ice pick, hammer, bumping and prying attempts. UL fire-rated latch performance is verified for continuous exposure on rated door assemblies. The heavy-duty Grade 1 mechanism cycles reliably through repeated daily operation without degradation. Solid brass and steel components resist wear in demanding commercial environments.

Highlights

  • Highest ANSI Grade 1 certification for maximum residential security
  • Double cylinder requires a key on both sides for controlled access
  • Patented key control system prevents unauthorised duplication
  • UL 437 listed cylinder resists drilling and picking attacks
  • Adjustable backset fits standard door preparations from 2-3/8 to 2-3/4 inches

Specifications

FinishBright Brass
Selling UnitBox
TypeDeadbolts
Security LevelHeavy Duty
Grade1

Questions about this item

What door thickness range does the adjustable backset of the Mul-T-Lock HD2-26 cover?

The adjustable backset fits door recesses from 2 3/8 inches to 2 3/4 inches.

Which step is often missed when installing the double cylinder deadbolt?

Many installers forget to align the tailpiece horizontally before tightening the mounting screws, which prevents the key from turning on both sides.

When should the UL437 cylinder be replaced to maintain drill and pick resistance?

Replace the cylinder if it shows signs of tampering, after a forced-entry attempt, or if the key begins to bind during normal operation.

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