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Crenshaw Lock

High Security Locks in Covina · 24/7 mobile

High Security Locks in Covina, California

Crenshaw Lock Company installs pick-, bump- and drill-resistant high security locks and restricted keys for homes and businesses in Covina, California. We are fully mobile and available 24/7, so we come to you. Call (323) 997-8867 to talk through your doors and options.

  • Mobile to your Covina 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 high security lock is not simply a more expensive deadbolt. It is built to resist the specific ways locks get defeated: picking, bumping, drilling, and forced key copying. In Covina, where many homes and storefronts still run hardware that is decades old, upgrading the lock cylinder and the key system is one of the most practical improvements an owner can make.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and David Shar and our technicians do this work on-site. We are a mobile service with no storefront, so every job begins with a conversation about your door, your frame, and what you are trying to protect, and then we bring the right hardware to you.

We do not push one product on everyone. A 1920s bungalow near Citrus Ave, a ranch home in Covina Hills, and a small retail shop downtown have different doors and different risks. The goal is a lock that fits the door, works smoothly every day, and is hard to beat.

How it works in Covina

  1. 1

    Call and describe the door

    Call (323) 997-8867 any hour. Tell us what kind of door it is, what lock is on it now, and your concern, whether that is a break-in, a former tenant or employee holding keys, or simply wanting stronger protection.

  2. 2

    On-site assessment

    We come to your Covina address and inspect the lock, strike plate, door edge, and frame. A strong cylinder is of little use if the door jamb is weak or the strike is held by short screws, so we check the whole assembly.

  3. 3

    Choose the right system

    We explain options such as pick-, bump- and drill-resistant cylinders and restricted keyways, where key duplication is controlled. We match these to your door type, including older mortise and rim locks common in historic buildings.

  4. 4

    Installation and reinforcement

    We install the new hardware, and where appropriate reinforce the strike, use longer screws, or fit the cylinder to your existing lock body so the door keeps its character.

  5. 5

    Testing and key handoff

    We test the lock from both sides, confirm the latch and bolt throw cleanly, and hand over your keys. We explain how restricted key copying works so you know how to add keys later.

Need high security locks in Covina?

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

Call (323) 997-8867

What affects the price

  • The grade and type of lock chosen, since restricted-keyway systems and drill-resistant hardening differ in construction.
  • Whether we are replacing only the cylinder or the entire lock body, as with an older mortise lock.
  • The number of doors and cylinders, and whether you want them all keyed alike.
  • Door and frame condition, including any strike or jamb reinforcement needed to make the lock effective.
  • Number of keys and any restricted key cards or extra copies you want.
  • Time of day and urgency of the visit, since we operate around the clock.

Why Covina chooses us

  • Fully mobile service: we bring the hardware and tools to your door instead of asking you to come to a shop.
  • In business since 1987, with owner and lead tech David Shar involved in the work.
  • We evaluate the door and frame, not just the lock, so the upgrade actually improves security.
  • Experience with older mortise and rim locks, which matters for Covina's 1920s-30s buildings and Craftsman bungalows.
  • Honest recommendations: if standard hardware is enough for your situation, we will say so.
  • Available 24/7, including when a break-in or lost key makes an upgrade urgent.

High Security Locks across Covina

Covina has an unusual mix of buildings for one city. Downtown Covina, centered on Citrus Ave near the Covina Center for the Performing Arts and Heritage Plaza, includes 1920s and 30s commercial buildings and Craftsman and Spanish bungalows nearby. Original mortise and older rim locks are common there, and fitting a modern high security cylinder into them takes care to preserve the door while raising its resistance.

East of downtown, Charter Oak (91724) is largely post-war tract and ranch-style housing, where the usual weak spots are builder-grade deadbolts and short strike screws. To the south, Covina Hills has larger-lot homes with more doors and side entrances to protect, and many owners choose keyed-alike high security cylinders so one key works throughout. Residents in 91722 and 91723 will find similar housing and similar needs.

We travel the main routes, including Interstate 10, Azusa Ave, Grand Ave, Badillo St, San Bernardino Rd and Arrow Hwy, to reach homes, apartments and small shops across Covina. Commuters who park at the Covina Metrolink station often ask about stronger locks for homes left empty during the day. 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 Covina locksmith services

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

High Security Locks in Covina — FAQs

What makes a lock high security?
It is designed to resist picking, bumping and drilling, and usually uses a restricted key that is harder to copy without authorization. Call (323) 997-8867 to discuss which type suits your door.
Can you install high security locks on my older Covina bungalow?
Yes. Many 1920s-30s homes near downtown have mortise or older rim locks. We can often fit a modern high security cylinder or upgrade the hardware while keeping the door's appearance.
Do you come to me, or do I visit a shop?
We are fully mobile and have no storefront. We come to your home or business anywhere in Covina, 24/7.
Will a high security lock stop a break-in by itself?
A strong lock is one part of the system. The door, frame and strike plate matter just as much, so we inspect and reinforce them during the visit.
Can I have all my doors keyed alike?
Usually yes. Many owners, especially in larger Covina Hills homes, want one key for multiple doors. We can set that up with compatible cylinders.
How do restricted keys work?
Restricted keys are cut on blanks that are not freely available, so copies typically require authorization. We explain the process when we hand over your keys.
Is this useful for a business downtown?
Yes. Small retail and offices near Citrus Ave often use high security cylinders to control keys and reduce risk from lost or unreturned keys. Call (323) 997-8867 to talk through your setup.
How is the price determined?
It depends on the lock type, whether we replace a cylinder or a full lock body, the number of doors, door and frame condition, and the number of keys. We will explain the factors before work begins.
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