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Polished brass mortise entry lockset with screw-on knobs and wide faceplate

Marks USA

Marks USA 71A/3 Polished Brass Left Hand Mortise Entry Door Lock 2-3/4" Backset

SKU CH-H9WD-HR21T MPN 71A/3

Left-hand mortise entry lockset with 2-3/4" backset, scissor and anti-friction latches, and solid brass cylinder

  • Security gradeHeavy Duty
  • Location typeCommercial/Institutional/Industrial/Residential
  • Backset distance2-3/4 in
  • Lock keyingKeyed Different
  • Main functionEntrance
  • Surface finishPolished Brass
  • Polished brass finish resists corrosion and matches traditional hardware
  • 2-3/4" backset fits standard commercial door preparations
  • Scissor latch with anti-friction latch ensures smooth, reliable operation
  • Left-hand configuration installs correctly on doors hinged on the left
  • Solid brass cylinder includes two keys for immediate secure access

Polished Brass Mortise Entry Lockset

The Marks USA 71A/3 is a heavy-duty mortise entry lockset finished in polished brass. It uses a 2-3/4" backset and a 1-1/4" x 8" wide faceplate for surface-mounted installation. The lockset includes screw-on knobs with a swivel spindle and a solid brass cylinder supplied with two keys. It is designed for left-hand doors in commercial, institutional, industrial, or residential settings.

Suits Left-Hand Doors Needing Surface Mounting

This lockset suits installers fitting a left-hand entrance door where a wide faceplate and surface-mounted screw-on knobs are specified. The scissor latch and anti-friction latch combine with a 1" deadbolt for heavy-duty security. It is not for right-hand doors, through-bolted knob requirements, or projects needing a narrow faceplate or a different backset dimension.

Fits Standard Mortise Prep With Wide Faceplate

The 1-1/4" x 8" faceplate covers a standard mortise pocket while the screw-on knobs simplify fitting without through-bolt hardware. The swivel spindle allows smooth lever operation and the solid brass cylinder accepts standard keying. The lockset frees the specifier from sourcing separate latch and deadbolt components for an entrance function.

How it compares

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

Price $116.99
Pricier than about 70% of the 2,145 comparable items (median $55.99).

Specifications

Product
Brand nameMarks
Product lineMetro
Model name71A/3
Product typeMortise Entry Lockset - Surface Mounted Screw-on Knobs with 1-1/4 in x 8 in Wide Face Plate
Design styleKnobs
Size & build
Surface finishPolished Brass
Main materialBrass
Backset distance2-3/4 in
More details
Security gradeHeavy Duty
Location typeCommercial/Institutional/Industrial/Residential
Lock keyingKeyed Different
Main functionEntrance

Questions about this item

Does this mortise lock require a 2-3/4" backset door preparation?

Yes, the lock is built for a 2-3/4" backset so the door must already be bored to that dimension.

Will the 1-1/4" x 8" faceplate cover the cutout left by an older narrower mortise lock?

The wide 1-1/4" x 8" brass faceplate is larger than many standard plates and will conceal most existing cutouts.

How can I confirm the scissor latch and anti-friction latch are engaging smoothly after installation?

Operate the knob and thumb turn; the latch should retract and extend without binding and the deadbolt should throw a full one-inch stroke.

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