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Polished brass mortise entry lockset with screw-on knobs and surface-mounted plates

Tuff Stuff

Tuff Stuff 6100AL Polished Brass Left Hand Mortise Entry Door Lock

SKU CH-FY61-40KAP MPN 6100AL

Left-hand mortise entry lockset with polished brass finish, screw-on knobs, swivel spindle and solid brass cylinder with two keys

  • Location typeCommercial/Residential
  • Backset distance2-1/2 in
  • Lock keyingKeyed Different
  • Main functionEntrance
  • Surface finishPolished Brass
  • Sold asBox
  • Polished brass finish resists corrosion and suits period interiors
  • Left-hand mortise entry function secures apartment doors
  • Screw-on knobs with swivel spindle simplify installation and operation
  • Solid brass cylinder with two keys provides durable keyed-different security
  • Surface-mounted plate assemblies fit commercial and residential frames

Product Identity

The Tuff Stuff 6100AL is a polished brass mortise entry lockset designed for left-hand apartment doors. It suits commercial and residential projects that require a surface-mounted installation with screw-on knobs and a swivel spindle.

Capacity and Headroom

The 2-1/2 inch backset and one-inch deadbolt throw handle standard door thicknesses for entrance functions. A solid brass cylinder with two keys operates the outside while a thumb turn controls the inside, covering typical access needs.

Interface Limits

The lockset follows a Marks 91A/3-like pattern with a 1-1/16 by 7-5/8 inch front faceplate, so it fits mortise pockets cut to that footprint. It will not suit right-hand doors, narrower backsets or cylindrical-prepped openings without modification.

How it compares

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

Price $52.99
Typical for this category: the median of 2,145 items is $55.99.

Specifications

Product
Brand nameTuff Stuff Security
Product lineMarks 91A/3 Like
Model name6100AL
Product typeMortise Entry Surface mounted Lock Set
Design styleKnobs
Size & build
Surface finishPolished Brass
Main materialBrass
Backset distance2-1/2 in
More details
Location typeCommercial/Residential
Lock keyingKeyed Different
Main functionEntrance

Questions about this item

Will the 2-1/2" backset align with my existing door prep?

The mortise lockset uses a 2-1/2" backset, which is a standard commercial dimension; verify your current door cutout matches this measurement before installation.

How do I confirm the deadbolt throws correctly after fitting?

Operate the outside cylinder and inside thumb turn through a full cycle; the 1" deadbolt should extend and retract smoothly without binding against the strike.

Does the box include the strike plate and mounting screws?

The lockset ships with solid brass cylinder, two keys, screw-on knobs, swivel spindle and surface-mounted plate assemblies; strike plate and mounting screws are sold separately.

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