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Crenshaw Lock

High Security Locks in Claremont · 24/7 mobile

High Security Locks in Claremont, California

Crenshaw Lock Company installs pick-, bump- and drill-resistant high security locks and keys throughout Claremont, California. We are a fully mobile locksmith available 24/7, and we come to your home, shop or building. Call (323) 997-8867 to talk through your door and your security goals.

  • Mobile to your Claremont 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 a lock engineered to resist the specific ways doors actually get defeated: picking, key bumping, drilling, and forced removal. The keys are often restricted too, which means copies cannot be cut at just any hardware counter. For many Claremont properties, that combination matters more than a heavy-looking lock that still opens to a bump key.

Claremont is an unusual mix. Around Claremont Village and the older streets nearby, there are Craftsman bungalows and period homes from the early 1900s whose owners care about keeping original character. On the other side of town, The Claremont Colleges bring dormitories, labs and academic buildings with layered key control needs. North Claremont and Claraboya add newer and hillside homes with their own concerns. One product does not fit all of those, and we do not pretend it does.

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 everything starts with a conversation by phone and then a visit to your property to look at the actual door, frame and hardware before recommending anything.

How it works in Claremont

  1. 1

    Talk through what you are protecting

    Call (323) 997-8867 and tell us about the property: a Village bungalow, a rental, a shop, or an office. We ask about who currently holds keys, past break-in attempts, and whether you want restricted keys that cannot be copied casually.

  2. 2

    Assess the door, frame and existing hardware

    We come to you and inspect the door's material, thickness, strike plate, frame condition and hinges. A strong cylinder in a weak frame is wasted money, so we tell you honestly if the door itself needs reinforcement.

  3. 3

    Choose the right lock and key control level

    We explain the options in plain terms: pick-resistant pin designs, bump-resistant mechanisms, drill-resistant hardened inserts, and patented or restricted keyways. You decide how much key control suits your situation.

  4. 4

    Install with care for the door

    Installation is done on-site. On older doors, including those in historic homes, we work to avoid unnecessary cutting or boring and discuss options that respect the original woodwork where possible.

  5. 5

    Test, cut and hand over keys

    We test operation from both sides, confirm the bolt throws fully into the strike, and provide your keys. For restricted systems, we explain how authorized duplication works so you know how to add keys later.

  6. 6

    Document and plan for the future

    If you may add more locks later, we can discuss keying them alike or into a hierarchy so one system covers several doors without a ring of mismatched keys.

Need high security locks in Claremont?

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 brand you choose, including whether the key is restricted or patent-protected
  • How many doors or cylinders are being upgraded and whether they are keyed alike
  • The condition of the door and frame, and whether reinforcement such as a heavier strike plate is advisable
  • Whether the work involves a mortise lock, which can need more labor than a standard bored deadbolt
  • Complexity of a master-key or multi-user system, including future expansion
  • Time of day and location of the visit, since we are available around the clock

Why Claremont chooses us

  • Fully mobile service: we assess your real door in person rather than selling from a counter
  • In business since 1987, with owner David Shar leading the work
  • We tell you when a door or frame is the weak point rather than upselling a lock
  • Comfortable with period hardware, including mortise locks that preservation-minded owners want to keep
  • Experience with both single-door residential upgrades and multi-user key systems
  • Available 24/7, including after a break-in when you need a door secured quickly

High Security Locks across Claremont

In Claremont Village, the walkable streets around Yale Ave mix retail shops and restaurants with historic homes. Shops there often need a better lock on a back or service door, while Craftsman owners want security that does not mean ripping out original mortise hardware. We can often upgrade the cylinder or add a high security deadbolt while leaving period character intact. Homes in ZIP code 91711 vary widely in age, so we look at each door individually.

The Claremont Colleges, including Pomona, Harvey Mudd, Scripps, Claremont McKenna and Pitzer, rely on larger access-control and master-key arrangements. For buildings with many users, restricted keyways and organized key hierarchies help limit unauthorized copying and make lost keys easier to manage. We can discuss that kind of work for campus-adjacent or institutional spaces.

In North Claremont and Claraboya, newer and hillside homes near Claremont Hills Wilderness Park often have more isolated entrances and side doors. A drill-resistant, pick-resistant lock on those doors is a sensible step. Whether you are off Indian Hill Blvd, Base Line Rd, or Foothill Blvd, we travel to you, with no shop to visit.

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 Claremont locksmith services

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

High Security Locks in Claremont — FAQs

What makes a lock "high security"?
It is built to resist picking, bumping and drilling, and often uses a restricted key that cannot be duplicated freely. Call (323) 997-8867 and we can explain the options for your door.
Can you upgrade locks on a historic Claremont Village bungalow?
Often yes. We can look at rekeying or rebuilding an original mortise lock, or adding a discreet high security deadbolt, with an eye toward keeping the door's character.
Do you work on multi-user or master-key systems?
Yes, we can discuss restricted keyways and key hierarchies for buildings with many users. Describe the setup when you call (323) 997-8867 and we will advise.
Will a high security lock stop every break-in?
No lock is unbeatable. These locks resist common attacks, but the door, frame and strike plate matter as well, so we check those too.
Are you open at night or on weekends?
We are available 24/7 and fully mobile, so you can call any time.
Do I need to come to a shop?
No. We have no storefront. We come to your Claremont home, business or building.
Can extra keys be copied for a restricted system?
Restricted keys are copied through authorized channels rather than at ordinary key kiosks. We explain the process when we install, and you can reach us at (323) 997-8867 to arrange additional keys.
How is the cost determined?
It depends on the lock type, key control level, number of doors, and the condition of the door and frame. We discuss these factors before starting work.
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