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Crenshaw Lock

Master Key System in City of Industry · 24/7 mobile

Master Key System Installation in City of Industry, California

Crenshaw Lock Company designs and installs master key and restricted-key systems for warehouses, distribution centers and tenant buildings in City of Industry, California. We are fully mobile and available 24/7, and we come to your site. Call (323) 997-8867 to plan your system.

  • Mobile to your City of Industry location
  • Available 24/7
  • Price quoted before we start
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City of Industry is almost entirely commercial. There are only a few hundred residents, and the rest of the city is warehouses, distribution centers, cold-storage and import/export facilities, light manufacturing and aluminum-storefront flex units. A building like that can have dozens of dock doors, offices, supply rooms and perimeter gates, and many people need to get through some of them but not others. Without a plan, keys multiply, copies circulate and nobody can say who can open what.

A master key system fixes that by putting your doors into a hierarchy. A manager's key can open a whole department, a supervisor's key opens a smaller group, and an individual employee's key opens only the doors that person needs. A restricted keyway adds another layer, because the blanks cannot be copied at a hardware store or kiosk without authorization. Together with written key control, this gives you real accountability over who holds access.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and owner and lead tech David Shar leads our commercial work. We are mobile only, with no storefront to visit. We come to your facility, look at the hardware you actually have, and build the system around it. That matters in Industry, where buildings often mix high-security deadbolts, rim cylinders, mortise exit devices, panic bars and padlocked dock doors, all of which have to work together in one keying plan.

How it works in City of Industry

  1. 1

    Walk the site and list every opening

    We come to your facility and inventory each opening: office doors, dock man-doors, roll-up door padlocks, perimeter and fleet gates, storage cages and any exit devices. We note the cylinder type on each, because rim cylinders, mortise cylinders and padlocks may need different solutions.

  2. 2

    Map who needs access to what

    We sit down with you, or your facility or operations manager, and sort people into access levels. A night-shift lead, a warehouse manager, a tenant and a cleaning contractor each need different reach. Getting this on paper before cutting any keys prevents expensive changes later.

  3. 3

    Design the key hierarchy

    We build a keying plan with a top master, any sub-masters and individual change keys. We also tell you plainly about the trade-offs. Larger systems with more levels offer flexibility but can reduce security margins, so we keep the design as simple as your operation allows.

  4. 4

    Choose restricted keyways and hardware

    Where key control matters, we recommend a restricted keyway so duplicates require authorization. Where existing hardware cannot be keyed into the system, we explain whether to rekey, swap cylinders or replace the device, such as a worn panic bar or a weak padlock.

  5. 5

    Install, rekey and test every door

    We pin or install the cylinders, rekey existing locks where possible and test each key against every door it should and should not open. Dock doors, gates and exit devices get a function check so nothing sticks or fails under daily use.

  6. 6

    Set up key control and records

    We hand over keys with a written record of the hierarchy and advise on a sign-out process. After a termination or lost key, you will know what to rekey rather than having to guess. We are available 24/7 if a problem comes up later.

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What affects the price

  • The number of doors, gates and padlocks that need to be included in the system.
  • How many access levels you want, such as a grand master, sub-masters and individual keys.
  • Whether you choose a restricted keyway with controlled duplication or a standard keyway.
  • Whether existing hardware can be rekeyed or has to be replaced, including worn mortise cylinders, rim cylinders and exit devices.
  • The number of keys to be cut and how they are distributed across shifts, tenants and contractors.
  • Whether the work is scheduled in advance or is an urgent after-hours rekey following a termination or security concern.

Why City of Industry chooses us

  • We are fully mobile and work on your premises, so we see your real doors and hardware before recommending a design.
  • We have been in business since 1987, with long experience in commercial and multi-tenant keying around Los Angeles County.
  • We are available 24/7, which suits operations with night shifts and urgent rekeys after an employee leaves.
  • We cover the whole building, from offices to dock doors, perimeter gates, exit devices and padlocks, so one plan works everywhere.
  • We tell you plainly when a simpler system is more secure than a complicated one.
  • We document the hierarchy so you are not dependent on memory when staff or tenants change.

Master Key System across City of Industry

In City of Industry, a master key system is usually a warehouse project. Think of a distribution building off Valley Blvd where one manager's key should reach dock doors, offices and perimeter gates, while a temporary worker's key opens only the break room and one dock door. When an employee is terminated, the usual question is whether every door they could open needs to be rekeyed. A properly designed system lets you rekey only the affected level instead of the whole facility.

We work across the city's commercial districts, including Grand Crossing, the Bassett-adjacent industrial district and the area near Industry Hills, and in ZIP codes such as 91746, 91744 and 91789. Many of these ZIPs reflect the business-only character of the area. Buildings near SR-60, I-605 and Azusa Ave often have heavy truck traffic and shared yards, so gates, padlocks and dock-door hardware get hard use and need careful keying.

We also see mixed hardware: aluminum-storefront flex and office units next to cold-storage and import/export operations, some close to the City of Industry rail yards. A tenant building may need a landlord master over many separate tenant systems. Whether you operate near Pacific Palms Resort, the Industry Hills Golf Club or the former Puente Hills Mall site, call (323) 997-8867 and we will come to you.

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Other City of Industry locksmith services

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

Master Key System in City of Industry — FAQs

What is a master key system?
It is a keying plan in which each door has its own key, and higher-level keys also open groups of doors. A manager's master can open many doors while an employee's key opens only a few. It gives you control without carrying a ring of keys.
Can you set up a master key system for a warehouse in City of Industry?
Yes. We are mobile and come to your warehouse or distribution center. We cover offices, dock doors, perimeter gates and padlocks. Call (323) 997-8867 to discuss your building.
What should we do after an employee is terminated?
Rekey the doors that person could open, and review any keys they held. If you have a master key system, we can often rekey just the affected level rather than the whole building. Call (323) 997-8867 any time, since we are available 24/7.
What is a restricted keyway and do we need one?
A restricted keyway uses key blanks that are controlled, so copies cannot be easily made without authorization. It is worth considering for facilities with many employees, contractors or tenants where uncontrolled copies are a risk.
Can existing locks be added to a master key system?
Often, yes. Many rim cylinders, mortise cylinders and padlocks can be rekeyed or have cylinders swapped. Some old or damaged hardware, such as a failing panic bar, is better replaced, and we will tell you which.
Do you handle padlocks and dock-door hardware too?
Yes. We can remove a cut or seized padlock on a yard or container and replace it with a high-security option that fits your key plan. We can also service roll-up dock-door hardware and exit devices.
Do you have a shop I can visit?
No. Crenshaw Lock Company is mobile only, and we come to your site in City of Industry. Call (323) 997-8867 and we will plan the visit.
Does a bigger master key system mean less security?
It can. Each added level and each extra key adds some risk, so we keep the design as simple as your operation allows. We talk through these trade-offs before anything is installed.
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