First Watch Security Polished Brass Bit Key Mortise Lock-1155 - The Home Depot
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First Watch Security

Model # 1155

Internet # 202799865

Polished Brass Bit Key Mortise Lock

First Watch Security Polished Brass Bit Key Mortise Lock

This item has been discontinued.
The Home Depot no longer carries this specific product.

$9.43 / each


Model # 1155

Internet # 202799865

First Watch Security has been designing, manufacturing, and delivering home security products since 1959. Today, First Watch Security is one of the most recognized brands in the market. Our Brand is found on products that include home, office, and door security offerings. Our knobs and rosettes are designed to replace or upgrade most applications. Choose from a variety of traditional or contemporary styles and finishes that meet your passage and privacy applications.

  • Mortise lock with brass plated faceplate
  • Case-hardened steel case
  • Replaces most bit key locks with 2-3/8 in. backset
  • Requires mortise cutout
  • Spindle hole accommodates 7 mm spindle


Assembled Depth (in.) 
2.88 in 
Assembled Height (in.) 
6 in 
Assembled Width (in.) 
0.88 in 
Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Accessory Type 
Commercial / Residential 
Commercial Hardware Type 
Mortise Locks 
Door Locks & Knobs Product Type 
Polished Brass 
Hardware Finish Family 
Hardware Included 
Product Weight (lb.) 
0.675 lb 
Security/ANSI Grade 
Warranty / Certifications
Certifications and Listings 
No Certifications or Listings 
Manufacturer Warranty 
30 Days 


Rated 2.3 out of 5 by 6 reviewers.
Rated 1.0 out of 5.0 by Do not wast your money Poorly made product that fell apart in less than a week February 25, 2015
Rated 3.0 out of 5.0 by The lock works well but can't get spare keys. Although the lock works well, a key broke off part of the end that turns the inner lock. A replacement can not be found. A new lock may have to be installed to prevent being locked out of the house if the only key left also breaks. March 6, 2013
Rated 3.0 out of 5.0 by Seems a little flimsy, but works. The First Watch mortise lock seems a little flimsy compared to others I've installed, but it does work as advertised, and was inexpensive. I'm satisfied, but I will likely look for a more solid lock next time. May 29, 2012
Rated 5.0 out of 5.0 by Still working Bought 3 of these 14 years ago at Home Depot in Madison Tn. One of them finally starting to hang when opening door. I would say 14 years of service is not bad for a low priced morticed lock. February 7, 2014
Rated 1.0 out of 5.0 by Dissappointed I purchased this replacement specifically to get rid of a mortise lockset that "jammed up" all the time, which means the striker bolt would pivot as it was retracted during knob rotation and jam up against the inside surface of the lockset. Well, just two days after installation, this new one is doing the same exact thing!! Cheap mortise locksets are just that. Spend the extra money and eliminate the hassles. August 13, 2013
Rated 1.0 out of 5.0 by This lock is poorly made. I don't expect an amazing lock for $8 but I do expect that it will at least work correctly. This lock, if you twist the doorknob 90 degrees the latch recedes all the way into the housing and gets stuck on the edge. To get it to come back out you have to wiggle the doorknob back and forth. It is a clone of a far better lock made by Ilco which sells for $11 and is well worth the premium. July 18, 2013
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