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Antique brass mortise lockset with double cylinders and flat ball knobs

Marks USA

Marks USA 21AC5LHR Antique Brass Left Hand Reverse Double Cylinder Mortise Door Lock

SKU CH-TAJE-E9SJ9 MPN 21AC5LHR

Antique brass mortise lockset with double cylinders and through-bolted trim for steel gates

  • FinishAntique Brass
  • KeyingKeyed Different
  • Antique Brass finish resists wear on entry doors
  • Left-hand-reverse mortise suits iron-gate and storm doors
  • Double cylinder throws 1" deadbolt from both sides
  • Through-bolted Unilock trim keeps knobs secure over time
  • Spring-loaded self-adjusting spindles install without visible screws

Antique Brass Double Cylinder Mortise Lockset

The Marks USA 21AC5LHR is an antique brass finished mortise lockset designed for left hand reverse door openings. It suits residential and light commercial entries where a traditional appearance and keyed operation on both sides are required. The set includes two solid brass cylinders and two keys for immediate installation.

Replaces Surface Rim Locks On Steel Gates

This mortise unit upgrades older surface mounted hardware by recessing the mechanism into the door edge for a cleaner profile and stronger engagement. The jump is worth it when the door thickness falls between 1-3/8" and 1-3/4" and the frame can accommodate a 1" x 7-1/8" face plate with a 2-1/2" backset. It also fits right hand doors thanks to a reversible design.

Handles Standard Entry Doors With 1" Deadbolt Throw

The 1" deadbolt provides solid resistance against forced entry on wood or steel doors up to 1-3/4" thick. Through bolted trim and spring loaded self adjusting spindles keep the knobs secure through repeated use. The double cylinder function requires a key on the interior side, so it is not suited for openings where quick egress without a key is a life safety requirement.

Highlights

  • Antique Brass finish resists wear on entry doors
  • Left-hand-reverse mortise suits iron-gate and storm doors
  • Double cylinder throws 1" deadbolt from both sides
  • Through-bolted Unilock trim keeps knobs secure over time
  • Spring-loaded self-adjusting spindles install without visible screws

Specifications

BrandMarks USA
Model21AC5LHR
FinishAntique Brass
KeyingKeyed Different

Questions about this item

What door thickness range does this mortise lockset fit?

It fits doors from 1-3/8" to 1-3/4" thick, covering standard interior and exterior steel gates.

How is the UNILOCK knob trim secured to the mortise case?

The trim is through-bolted with spring-loaded captivated self-adjusting spindles and screwless knobs for alignment.

How many keys are supplied with the two solid cylinders?

Two keys are included, one for each antique brass finish cylinder in the double-cylinder set.

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