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Crenshaw Lock

High Security Locks in Glendora · 24/7 mobile

High Security Locks in Glendora, California

Crenshaw Lock Company installs pick-, bump- and drill-resistant high security locks and restricted keys throughout Glendora, California. We are a fully mobile locksmith available 24/7, and we come to your home or business. Call (323) 997-8867 to talk through your doors and what level of protection makes sense.

  • Mobile to your Glendora 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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A standard builder-grade deadbolt is designed to keep honest people honest. It was never meant to stand up to someone who knows how to pick, bump, or drill a cylinder. High security locks close those gaps with tighter tolerances, hardened inserts, anti-pick pin designs, and key systems where blanks cannot be copied at a hardware store kiosk. For some Glendora properties, that upgrade is simply sensible.

Glendora covers a lot of ground, from custom foothill homes in North Glendora to post-war tract houses in the south end and historic buildings in Glendora Village. Each one asks something different of a lock. A hillside house with a long private drive and multipoint patio doors has different exposure than a downtown boutique with an old storefront door. We have served Greater Los Angeles and Ventura County since 1987, and owner David Shar leads the work, so these decisions come from experience rather than a sales script.

We are mobile only. There is no shop to visit: we bring the hardware and tools to your door, look at what is actually there, and install on the spot where possible. We will tell you plainly when a high security cylinder is worth it and when a well-installed standard deadbolt and a stronger strike plate would do the job.

How it works in Glendora

  1. 1

    Talk through your goals

    Call (323) 997-8867 and tell us what you want to protect and why. Maybe you had a break-in attempt, lost a key you cannot account for, or want control over who can ever duplicate a key. That conversation shapes the whole job.

  2. 2

    On-site door and hardware assessment

    We come to you and inspect the door, frame, strike, hinges, and existing hardware. A pick-resistant cylinder in a weak frame is wasted money, so we check how the door itself would hold up to force.

  3. 3

    Choose the right lock and key system

    We explain options such as restricted keyways with controlled duplication, drill-resistant hardened inserts, and anti-bump designs. We match them to your door type, whether a single-point deadbolt, a multipoint patio system, or a storefront cylinder.

  4. 4

    Installation and reinforcement

    We install the new locks and, where appropriate, reinforce the strike plate, use longer screws into the framing, and correct alignment so the bolt throws fully. Fit matters as much as the lock itself.

  5. 5

    Testing and key handoff

    We test every lock repeatedly from both sides, confirm smooth operation, and hand over your keys along with any key-control or authorization details specific to the system you chose.

  6. 6

    Care and follow-up guidance

    We show you how to keep the hardware working well, including cleaning advice for dusty foothill conditions, and explain how to order additional keys through the proper channel.

Need high security locks in Glendora?

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

Call (323) 997-8867

What affects the price

  • The lock grade and key system you choose, since restricted keyways with controlled duplication cost differently than standard high-security cylinders.
  • The number of doors and cylinders involved, including side doors, garage entries, and patio doors.
  • Door and frame condition, because reinforcement or minor repair may be needed for the new lock to perform properly.
  • Door type, such as a single-point deadbolt versus a multipoint system on a patio or custom entry.
  • Whether existing hardware like Baldwin or Emtek sets can accept a high-security cylinder or needs replacement.
  • Time of day and urgency, since after-hours calls differ from scheduled upgrades.

Why Glendora chooses us

  • Fully mobile service: we bring the hardware to your Glendora address, so you are not driving anywhere to shop for locks.
  • Serving the region since 1987, with owner and lead tech David Shar guiding the work.
  • We assess the door and frame, not just the cylinder, so the upgrade actually improves security.
  • Honest recommendations: if a standard lock properly installed fits your risk, we will say so.
  • Experience with higher-end residential hardware and multipoint systems common on custom foothill homes.
  • Available 24/7 for urgent situations like a break-in aftermath that needs locks secured right away.

High Security Locks across Glendora

North Glendora's foothill estates are a natural fit for high security work. Many of these larger hillside and custom homes date to the mid-century era, some sit behind gates or at the end of long private drives, and they are often fitted with Baldwin or Emtek hardware and multipoint patio doors. Long driveways and homes near Big Dalton Canyon and the foothill trailheads can mean more seclusion, which is a good reason to think about pick- and drill-resistant cylinders and sturdy frames on every exterior door. In ZIP code 91741, we often start with the patio doors, which people forget.

In Glendora Village, the historic downtown has early-1900s buildings and boutique storefronts, many with older doors and frames that need careful fitting. A high security cylinder on a storefront door can help protect inventory and the business after closing, and key control matters when staff come and go. Around Citrus College and along Route 66 at Alosta Ave and Foothill Blvd, we see mixed commercial and residential needs, and we adapt to each.

South Glendora, in ZIP code 91740, is mostly post-war single-family tract housing. These homes often still have original or basic deadbolts, so a targeted upgrade of the front and back doors can make a real difference. Dry Santa Ana wind seasons also leave grit in locks, so we pay attention to cylinder quality and cleaning guidance. Whether you are near Grand Ave, Glendora Ave, Lone Hill Ave, or just off the 210, we 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 Glendora locksmith services

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

High Security Locks in Glendora — FAQs

What makes a lock high security?
High security locks use tighter tolerances, anti-pick pin designs, hardened components to resist drilling, and often restricted keys that cannot be freely duplicated. They are built to resist picking, bumping, and drilling better than standard builder-grade locks.
Do you serve all of Glendora?
Yes. We are a fully mobile locksmith serving North Glendora, Glendora Village, South Glendora, and both ZIP codes 91740 and 91741. Call (323) 997-8867 to discuss your address.
Can high security cylinders fit my Baldwin or Emtek hardware?
Often they can, depending on the specific hardware and cylinder type. We check what you have during the assessment and tell you whether the cylinder can be swapped or the set needs replacing.
Will a better lock help if my door frame is weak?
Only partly. A strong cylinder is not much help if the strike plate or frame gives way. We inspect the frame and can reinforce it so the whole door performs as a system.
Can you upgrade multipoint patio door locks?
We service multipoint systems common on custom foothill homes. Depending on the make, we can rekey, repair, or upgrade components. Call (323) 997-8867 with the brand if you know it.
Do you have a shop I can visit?
No. We are mobile only, so we come to your home or business in Glendora with the tools and hardware needed.
Can you help a downtown storefront?
Yes. We work on storefront doors in Glendora Village, including cylinder replacement and high security upgrades, and we can set up key control for staff access.
Are you available after hours?
We are available 24/7. For urgent needs, such as securing a door after an attempted break-in, call (323) 997-8867 any time.
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