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Polished brass mortise entry lockset with screwless knobs and thumb turn

Gotham

Gotham 9900LAK Polished Brass Left Hand Mortise Entry Lockset

SKU CH-9AEA-1WNFY

Heavy-duty mortise entry lockset with through-bolted brass plates, screwless knobs and a self-adjusting spindle, supplied with two keys

  • Security gradeHeavy Duty
  • Location typeCommercial/Residential
  • Backset distance2-1/2 in
  • Lock keyingKeyed Different
  • Main functionEntrance
  • Surface finishPolished Brass
  • Heavy-duty security from solid brass construction
  • Left-hand mortise design fits specific door orientation
  • Through-bolted knob plates strengthen the assembly
  • Screwless knobs with self-adjusting spindle ease installation
  • Solid brass cylinder includes two keys

Left-Hand Mortise Entry Lockset

The Gotham 9900LAK is a heavy-duty mortise lockset finished in polished brass. It is designed for left-hand doors in commercial or residential entrances. Solid brass plates and a solid brass cylinder provide durable construction. Two keys are included for the keyed-different cylinder.

Through-Bolted Screwless Knob Assembly

Knob plates are through-bolted for a secure mechanical bond that resists loosening over time. Screwless knobs use self-adjusting spindles to maintain alignment without visible fasteners. The 2-1/2 inch backset suits standard mortise preparations. A 1 inch deadbolt throw and a 1-1/16 by 7-5/8 inch front face plate complete the hardware.

Commercial-Grade Brass Cylinder

The solid brass cylinder handles daily traffic on main entry doors and includes two cut keys. Keyed-different supply means each set operates independently unless rekeyed by a locksmith. Left-hand orientation limits installation to doors hinged on the left when viewed from outside. Buyers needing right-hand operation or multi-point locking must select a different model.

How it compares

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

Price $93.99
Pricier than about 64% of the 2,145 comparable items (median $55.99).

Specifications

Product
Product lineMarks 114A/3 Like
Product typeMortise Entry Thru Bolted Lock Set
Design styleKnobs
Size & build
Surface finishPolished Brass
Main materialBrass
Backset distance2-1/2 in
More details
Security gradeHeavy Duty
Location typeCommercial/Residential
Lock keyingKeyed Different
Main functionEntrance

Questions about this item

Should I pick the 2-1/2 inch backset or a different size for my door?

This lockset is built with a 2-1/2 inch backset; choose it when your door prep matches that measurement.

How does the 1 inch deadbolt perform once installed?

The 1 inch throw deadbolt extends fully into the strike for strong resistance against forced entry.

What does the Marks 114A/3 style through-bolted design mean for installation?

Through-bolted plates clamp both sides of the door so the knobs stay rigid without exposed screws.

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