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Crenshaw Lock

Master Key System in Irwindale · 24/7 mobile

Master Key System in Irwindale, California

Crenshaw Lock Company designs and installs master-key and restricted-key systems with real key control for Irwindale businesses, plants, yards and facilities. We are fully mobile and available 24/7, with no storefront. To plan a system for your site, call (323) 997-8867.

  • Mobile to your Irwindale location
  • Available 24/7
  • Price quoted before we start
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A master key system lets the right people open the right doors with as few keys as possible. A shift supervisor might carry one key that opens every interior door in a building. A warehouse lead might carry one that opens only the dock offices. The owner holds a top-level key above all of them. Done well, it cuts down on key rings that weigh a pound, and it gives you a clear record of who can open what.

Irwindale is a different kind of city for this work. Most of the land is industrial: gravel quarries, aggregate yards, distribution centers, beverage and food plants, and sound stages. Those sites tend to have many doors, many gates, many shifts and many outside contractors, so key control matters more than it does at a typical office. A truck driver, a maintenance vendor and a plant manager each need different access, and none of them should be able to copy a key at a hardware counter.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987 under owner and lead technician David Shar. We are fully mobile, so we come to your gate, plant or office, survey the site, and build the system there. This page explains how a master key or restricted-key project works, what drives the cost, and what is specific to doing it in Irwindale.

How it works in Irwindale

  1. 1

    Walk the site and list every opening

    We start by visiting the property and counting what needs to be keyed: interior doors, exterior doors, gates, cabinets, padlocked yards, equipment sheds and any existing electronic access. We note which openings are already on commercial cylinders and which are not. On a large or spread-out site, such as a yard with several perimeter gates, this survey is the most important step.

  2. 2

    Map who needs access to what

    Next we sit down with you and sort people and roles into levels: grand master, master, sub-master and individual keys. We ask about shifts, vendors, contractors and seasonal staff. The goal is a hierarchy that matches how your operation really runs, not a generic chart, with as few keys per person as is practical.

  3. 3

    Choose the keyway and level of key control

    We talk through restricted keyways, where blanks and duplication are controlled, versus conventional keyways that anyone can copy. Restricted systems usually suit sites with high turnover or valuable inventory. We explain the tradeoffs plainly and recommend what fits your risk, rather than selling the most elaborate option.

  4. 4

    Pin, install and test the cylinders

    We build the cylinders to the agreed hierarchy, replace or rekey the hardware on site, and test every key against every lock it should and should not open. Mistakes in master keying show up as a key opening something it should not, so we check both directions before we leave.

  5. 5

    Deliver keys, records and a key-control plan

    You receive the keys, labeled by level, and a written bitting and hierarchy record so the system can be expanded later. We help you set up simple procedures: who signs for keys, what happens when someone leaves, and how to add new doors without compromising the system.

  6. 6

    Expand or adjust as you grow

    Plants add buildings, yards add gates and tenants change. A properly documented master key system can grow without starting over. We can return to add cylinders, rekey after a lost key, or tighten control on a section that needs it.

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What affects the price

  • The number of openings: more doors, gates and padlocks means more cylinders to build, install and test.
  • The depth of the hierarchy: a single master level is simpler than a grand master with several sub-masters and many individual keys.
  • The type of keyway: restricted, patent-protected systems with controlled duplication differ in cost from conventional keyways.
  • The condition of existing hardware: worn or mismatched locks may need replacement instead of rekeying, and heavy gate locks and yard padlocks are specified differently from interior cylinders.
  • Integration with existing access control: if some doors use electronic readers, we plan which openings stay mechanical and which don't.
  • Site layout and scheduling: a spread-out property with many entry points, or work that must happen around production and event schedules, affects the time involved.

Why Irwindale chooses us

  • Fully mobile, 24/7: we work at your site, including off-hours installs that avoid interrupting a plant or event schedule. There is no shop to visit.
  • Operating since 1987: decades of commercial work in the Los Angeles area, led by owner David Shar, inform how we plan hierarchies.
  • Design before hardware: we map roles and access first, so the system reflects how your people really work.
  • Honest recommendations: we tell you when a restricted keyway is worth it and when a simpler setup does the job.
  • Written records: you get a clear hierarchy record so future expansion is straightforward and not a guessing game.
  • Experience with industrial hardware: gates, heavy padlocks and commercial cylinders, which is what most Irwindale properties rely on.

Master Key System across Irwindale

Irwindale is small in population but large in industry, and that shapes how master key systems are used here. Along Arrow Hwy and Irwindale Ave, near the I-605 and I-210 corridors, you find distribution centers, beverage and food plants, and facilities like the Huy Fong Foods plant, where many employees, delivery drivers and contractors cycle through every day. A master key system for a site like that often separates production, shipping, offices and storage so a person on one team cannot wander into another area.

The quarry and Santa Fe Dam industrial district presents another need. Aggregate yards and mining pits depend on perimeter gates, heavy padlocks and equipment sheds spread across a lot of ground. Keying those openings alike or in a clear hierarchy, with restricted blanks, keeps a lost key from becoming a site-wide problem. Businesses in the 91706 ZIP code, and those that share 91702 and 91010 addresses nearby, often have just this mix of buildings and yards.

In the original townsite around Irwindale Ave and Los Angeles St, the stock is older and smaller. Small offices, shops and property managers there sometimes want a simple master system for a few doors. Venues such as the Irwindale Speedway & Event Center have their own rhythm, with staff, vendors and crews needing different access on event days. We plan around those realities, and because we are mobile we can come to the site, whether it's near the Metro A Line station or out by the dam.

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Other Irwindale locksmith services

See all of our Irwindale services, or our citywide master key system page.

Master Key System in Irwindale — FAQs

What is a master key system?
It is a lock setup where each lock has its own key, and higher-level keys can open groups of locks or all of them. A manager's key might open every door in a building while an employee's key opens only one area.
What is the difference between a master key and a restricted key system?
A master key system is about hierarchy: who can open what. A restricted system is about control over duplication, using keyways where blanks are not sold openly. Many Irwindale businesses combine the two. Call (323) 997-8867 to talk through which suits your site.
Can you set up a master key system for a quarry or aggregate yard?
Yes. We work with gates, heavy padlocks and equipment sheds, and can organize them into a clear key hierarchy. The right design depends on how many gates you have and who needs access to each.
Can my existing locks be added to a master key system?
Often they can be rekeyed or have their cylinders replaced to fit the system. Some older or mismatched hardware is better replaced, and we tell you which after looking at it on site.
Do you work around production or event schedules?
Yes. We are available 24/7 and fully mobile, so installs can happen off-hours at plants, distribution centers or event venues to avoid disrupting operations.
What happens if a master key is lost?
We assess which level was lost and what it opens. Depending on the design, we may rekey a section or the entire system. Good records make this faster. Call (323) 997-8867 if you need help right away.
Can a master key system work with electronic access control?
Yes. Many sites keep mechanical keys for some doors, gates and cabinets and use electronic readers elsewhere. We plan which openings stay mechanical so the two work together.
Can I add doors to the system later?
Yes, if the system is documented. We keep a hierarchy record so new cylinders can be added to the same system without redoing existing locks.
DS

Reviewed by David Shar — Owner & Lead Technician

Crenshaw Lock Company has served Greater Los Angeles & Ventura County since 1987.

Last updated 2026-10-12.

Call (323) 997-8867 · Open 24/7