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Polished brass mortise lock knob left hand classroom function screwless through bolted

Marks USA

Marks USA 114D/3 Polished Brass Left Hand Mortise Door Lock

SKU CH-Y4DH-64AD7 MPN 114D/3

A left-hand mortise lockset with classroom function, latch-and-rocker operation and screwless through-bolted brass knobs in a polished brass finish

  • Backset distance2-1/2 in
  • Lock keyingKeyed Different
  • Main functionClassroom
  • Surface finishPolished Brass
  • Sold asBox
  • Product typeMortise Lock Knob, Office Vestibule, Passage Always Open OR
  • Classroom function secures the door from the outside while allowing free egress from inside
  • Latch-and-rocker mechanism operates without a bolt for smooth, quiet passage
  • Screwless knobs with self-adjusting spindle install quickly and stay aligned through bolted plates
  • Solid brass cylinder includes two keys for immediate keyed-different security
  • Polished brass finish on solid brass construction resists wear and corrosion in commercial traffic

Polished Brass Mortise Lockset

The Marks USA 114D/3 is a left-hand mortise door lock finished in polished brass. It belongs to the Metro series and uses a 2-1/2" backset. A solid brass cylinder with two keys is included.

Classroom function for controlled access

This lockset suits offices, vestibules and classrooms where the outside lever is locked by key and the inside lever always allows free egress. It is not for buyers who need a deadbolt, a thumb-turn inside, or a right-hand configuration.

Latch and rocker mechanism only

The latch and rocker design handles daily traffic without a bolt projection. Through-bolted plate assemblies and screwless knobs with a self-adjusting spindle provide secure mounting. The face plate measures 1-1/16" x 7-5/8".

How it compares

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

Price $81.99
Pricier than about 60% of the 2,145 comparable items (median $55.99).

Specifications

Product
Brand nameMarks
Product lineMetro
Model name114D/3
Product typeMortise Lock Knob, Office Vestibule, Passage Always Open OR Storeroom Always Locked, Classroom, Latch and Rocker (No Bolt) Lockset
Design styleKnobs
Size & build
Surface finishPolished Brass
Main materialBrass
Backset distance2-1/2 in
More details
Lock keyingKeyed Different
Main functionClassroom

Questions about this item

Does the Marks 114D/3 require a mortise pocket cut to the 1-1/16" x 7-5/8" face plate size?

Yes, the face plate measures 1-1/16" x 7-5/8" and fits a standard mortise pocket cut to those dimensions for the Metro series lock body.

Can the latch and rocker mechanism operate with a non-handed strike plate already on the frame?

The left-hand lock uses a latch and rocker with no bolt; it requires a strike plate suited to the latch projection and handing for proper engagement.

How do I confirm the classroom function is set correctly after installing the screwless knobs?

The outside knob is locked or unlocked by the solid brass cylinder key; the inside knob always retracts the latch for free egress, verifying the classroom function.

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