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Satin chrome mortise lever lockset with double cylinder, left hand orientation

Marks USA

Marks USA 2750C/26D Satin Chrome Left Hand Double Cylinder Mortise Lever Entry Door Lock

SKU CH-EF1W-GNV9S MPN 2750C/26D

Satin chrome mortise lever lockset with double-cylinder keying, 1-inch backset and left-hand mounting for steel security doors

  • Backset distance1 in (2.54 cm)
  • Lock keyingKeyed Different
  • Main functionDouble Cylinder
  • Surface finishSatin Chrome
  • Sold asBox
  • Product typeMortise Lockset
  • Slim Thinline profile fits narrow steel security doors
  • Satin chrome brass finish resists corrosion on exterior entries
  • Double cylinder requires a key on both sides
  • Left-hand lever orientation matches door swing direction
  • 1-inch backset suits standard mortise pocket preparation

Marks Thinline Mortise Lever Lock

The Marks USA 2750C/26D is a satin chrome mortise lever lockset built for steel security and storm doors. Its double cylinder function requires a key on both sides for controlled entry and exit. The left-hand configuration suits doors hinged on the left when viewed from outside. This commercial-grade hardware fits standard mortise preparations.

Brass Construction with 1 Inch Backset

Solid brass components deliver durability in high-traffic applications. The Thinline slim profile reduces visual bulk while maintaining strength through thru-bolted lever plate assemblies. Spring-loaded self-adjusting spindles keep lever action smooth without visible screws. Mounting holes are spaced at 8-1/4 inches for direct installation on prepared doors.

Verify Door Handing and Cylinder Needs

Confirm the door swings left-hand before ordering to match the lock orientation. Ensure the existing mortise pocket accepts a 1 inch backset and 1 inch deadbolt throw. Double cylinder operation means a key is always needed inside, which affects emergency egress planning. Check local fire codes for double cylinder restrictions on exit doors.

How it compares

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

Price $148.99
Pricier than about 76% of the 2,145 comparable items (median $55.99).

Specifications

Product
Brand nameMarks
Product line2750C
Model name2750C/26D
Product typeMortise Lockset
Design styleLever
Size & build
Surface finishSatin Chrome
Main materialBrass
Backset distance1 in (2.54 cm)
More details
Lock keyingKeyed Different
Main functionDouble Cylinder

Questions about this item

What backset does the 2750C mortise lock require?

The lock is built for a 1-inch backset, so the mortise pocket must be cut to that depth.

How wide is the front lock face plate on this trim set?

The face plate measures 1 inch wide by 9-7/16 inches tall, matching standard narrow-stile door prep.

Which side of the door gets the thru-bolted lever plate during installation?

Both the inside and outside lever plates are thru-bolted through the lock case; the screwless levers then snap onto the captivated spindles.

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