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Crenshaw Lock

High Security Locks in Walnut · 24/7 mobile

High Security Locks in Walnut, California

Crenshaw Lock Company installs pick-, bump- and drill-resistant high security locks and restricted keys across Walnut, California. We are a fully mobile locksmith available 24/7, and we come to your home, gate or property. Call (323) 997-8867 to talk through your setup.

  • Mobile to your Walnut location
  • Available 24/7
  • Price quoted before we start
Call (323) 997-8867or tap to call — we answer 24/7
High-security lock cylinder with a dimple key
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Most homes in Walnut were built with standard builder-grade hardware. That is fine for keeping a door closed, but it was never designed to resist someone who knows how to pick, bump or drill a cylinder. A high security lock changes that. These locks use tighter tolerances, hardened inserts, and more complex internal pin designs, and many pair with restricted keys that cannot be copied at a hardware-store kiosk.

Walnut is a newer suburban city with a lot of single-family tract homes on larger lots, many from the 1970s and 80s, plus newer custom homes and gated neighborhoods. Larger lots mean longer sight lines to side doors and back doors, and a front door is rarely the only way in. When we plan an upgrade, we look at every entry point: the front door, garage service door, side gates, sliding doors, and any outbuildings.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, led by owner and lead technician David Shar. We are mobile only, with no storefront, so every job begins with a conversation about what you are protecting and then a visit to your property. We will tell you honestly when a high security cylinder is the right answer and when a simpler fix, like a better strike plate or longer screws, will do the job.

How it works in Walnut

  1. 1

    Talk through what you need

    Call (323) 997-8867 any hour. We ask about the doors, gates or outbuildings you want to protect, what locks are there now, and whether you have had a break-in, a lost key, or just want peace of mind.

  2. 2

    Assess the doors and hardware

    We come to your Walnut property and inspect the door, frame, strike plate, and existing cylinder. A strong lock in a weak frame is a weak setup, so we check the whole assembly before recommending anything.

  3. 3

    Choose the lock and key system

    We explain the options in plain terms: pick-resistant and bump-resistant cylinders, drill-resistant hardened inserts, and restricted keyways with controlled key duplication. You decide what fits your home and your household.

  4. 4

    Install and reinforce

    We fit the new hardware, and where it makes sense we reinforce the strike and door edge so the lock is not undermined by the frame. Existing smart locks or gate-access hardware are considered so everything works together.

  5. 5

    Test and hand over keys

    We cycle every lock several times, confirm smooth operation, and hand over your keys along with guidance on how to order additional restricted keys through the proper authorization process.

Need high security locks in Walnut?

24/7 Mobile Locksmith across Greater Los Angeles & Ventura County. We answer 24/7.

Call (323) 997-8867

What affects the price

  • The number of locks and entry points you want upgraded, from a single front door to a full property including side doors and gates.
  • The grade and type of lock chosen, since restricted keyway systems and hardened drill-resistant components differ in design and cost.
  • Whether the door and frame need reinforcement, such as a stronger strike plate, longer screws, or repair of worn bore holes.
  • Compatibility with existing smart locks, deadbolts, or gate hardware that must work alongside the new cylinders.
  • Extra key needs, including additional restricted keys and whether you want locks keyed alike across several doors.
  • Time and location of the visit, since we are available around the clock and after-hours calls can differ from daytime scheduling.

Why Walnut chooses us

  • Fully mobile: we bring tools and hardware to your door in Walnut, so you do not have to go anywhere or leave your property unsecured.
  • In business since 1987, with owner David Shar leading the work and decades of hands-on experience with residential and commercial hardware.
  • We recommend the right level of security, not the most expensive one. If your frame is the weak point, we say so.
  • Available 24/7, so a break-in, a lost key set, or a failed lock does not have to wait until morning.
  • We think about the whole property, including gates, barn doors and side entries that are common on Walnut's larger lots.

High Security Locks across Walnut

Walnut sits between the San Jose Hills and Puente Hills, and its housing reflects that mix of suburban comfort and semi-rural space. In Snow Creek, the gated community, homeowners often have electronic locks and gate-access systems already in place. Those are convenient, but the physical cylinder on a service door or garage entry still matters, and we can upgrade those while working around your existing smart hardware. In Walnut Heights and the hillside pockets, larger lots and long driveways make the back and side of a house less visible from the street, which is a good reason to treat every door, not just the front, with a stronger lock.

Some properties in the Walnut hills also keep horses, which means barn doors, tack rooms and driveway gates that take real weather and use. Those locks need to be rugged as well as secure, and we can discuss hardened padlocks and gate hardware alongside house cylinders. If you are in ZIP code 91789 or 91788, we serve the whole area from SR-60 and SR-57 up through Grand Ave, Amar Rd, Valley Blvd, Lemon Ave, Nogales St and Pierre Rd.

Near Mt. San Antonio College, rentals and shared housing see frequent key turnover, so restricted keys and rekeying can make good sense for landlords and tenants alike. Whether you live near Suzanne Park or Creekside Park, or on a quiet cul-de-sac in the hills, call (323) 997-8867 and we will come to you.

Locked out or need a locksmith now?

24/7 Mobile Locksmith across Greater Los Angeles & Ventura County. We answer 24/7.

Call (323) 997-8867

Other Walnut locksmith services

See all of our Walnut services, or our citywide high security locks page.

High Security Locks in Walnut — FAQs

What makes a lock high security?
High security locks resist common attack methods such as picking, bumping and drilling. They use tighter tolerances, more complex pin systems and hardened inserts, and many use restricted keys that cannot be easily duplicated.
Do you serve all of Walnut?
Yes. We are mobile and serve Walnut including ZIP codes 91789 and 91788, from Snow Creek to Walnut Heights and the area around Mt. SAC. Call (323) 997-8867 to discuss your address.
Will high security locks work with my smart lock or gate system?
Often yes. Many Walnut homes have electronic locks or gate access, and we can upgrade the mechanical cylinders on other doors so everything works together. Describe your setup when you call (323) 997-8867.
Can I get extra keys copied anywhere?
Restricted keys are designed so they cannot be copied freely. Additional keys are ordered through an authorization process, which keeps control in your hands. We walk you through it at handover.
Is a high security lock enough on its own?
Not always. The door, frame and strike plate matter as much as the cylinder. We inspect these during the visit and reinforce them when needed so the lock is not the only strong link.
Can you secure a barn or driveway gate?
We can discuss rugged lock options for gates and outbuildings, which are common on equestrian properties in the Walnut hills. Call (323) 997-8867 so we can understand the gate and hardware first.
Do you have a shop I can visit?
No. Crenshaw Lock Company is fully mobile with no storefront. We come to your home, business or property anywhere in our service area.
Are you available at night or on weekends?
Yes, we are available 24/7. If you have had a break-in or lost keys and need locks changed right away, call us at any hour.
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