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Polished brass double cylinder mortise lockset with screwless knobs

Marks USA

Marks USA 22AC/3-W LHR Polished Brass Double Cylinder Mortise Door Lock

SKU CH-39MZ-S4TJ3 MPN 22AC/3-W

Polished brass ornamental mortise lockset with double cylinder, screwless knobs and a 2-1/2" backset for left-hand-reverse iron gates

  • Backset distance2-1/2 in
  • Lock keyingKeyed Different
  • Main functionOrnamental Entry Double Cylinder Mortise Lockset
  • Surface finishPolished Brass
  • Sold asEach
  • Product typeOrnamental Double Cylinder Mortise Lockset
  • Double-cylinder security with keyed-different access on both sides
  • Ornamental iron-gate styling in polished brass for period appearance
  • Screwless knobs with self-adjusting spindles simplify installation and alignment
  • Left-hand reverse handing suits doors that push open with hinges on the right
  • 2-1/2" backset fits standard gate and door preparations

Polished Brass Mortise Lockset

The Marks USA 22AC/3-W LHR is a double cylinder mortise lockset finished in polished brass. It is designed for ornamental iron gates and entry doors where a traditional knob style is required. The left-hand reverse handing suits doors that pull towards you with hinges on the right when viewed from the outside. This hardware provides keyed entry security from both sides of the opening.

Sustained Use Behaviour

Brass construction resists corrosion during long-term exposure to weather on exterior gates. The self-adjusting spindles maintain smooth knob operation even as the door or gate shifts slightly over time. Screwless knob design prevents hardware from loosening under repeated daily cycling. The mortise case protects the internal mechanism from dust and debris buildup during extended service.

Installation Practicalities

Mortise pocket preparation demands precise chiselling to fit the 1" x 7-1/8" faceplate and 2-1/2" backset accurately. Left-hand reverse handing must be confirmed before cutting using the three orientation questions supplied by the manufacturer. Thru-bolted mounting requires access to both sides of the gate or door for secure fastening. Double cylinder function means a key is always needed to exit, which affects emergency egress planning.

How it compares

Measured against everything we stock in Door Lock Sets & Deadbolts, at today’s prices. Recalculated every night.

Price $85.99
Pricier than about 61% of the 2,145 comparable items (median $55.99).

Specifications

Product
Brand nameMarks
Product line22AC/3-W LHR
Model name22AC/3-W LHR
Product typeOrnamental Double Cylinder Mortise Lockset
Design styleKnobs
Size & build
Surface finishPolished Brass
Main materialBrass
Backset distance2-1/2 in
More details
Lock keyingKeyed Different
Main functionOrnamental Entry Double Cylinder Mortise Lockset

Questions about this item

How much heat does the Marks 22AC/3-W LHR generate when the double cylinder operates continuously?

This mechanical mortise lock produces no heat during normal daily operation because it has no electrical components.

What door preparation is required before installing the 2-1/2" backset mortise lock?

The door needs a mortise pocket cut to accept the 1" x 7-1/8" faceplate and through-bolt holes for the screwless knob assembly.

Will the Left Hand Reverse handing work on an existing right-hand door frame?

No, LHR handing is factory-set for doors that pull toward you with hinges on the left; a right-hand frame requires the matching RH version.

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