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(323) 997-8867
Crenshaw Lock

High Security Locks in Duarte · 24/7 mobile

High Security Locks in Duarte, California

Crenshaw Lock Company installs pick-, bump- and drill-resistant high security locks and keys in Duarte, California. We are a fully mobile locksmith available 24/7, and we come to your home, office or gate. For a consultation or an urgent upgrade, call (323) 997-8867.

  • Mobile to your Duarte 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 keeps honest people honest, but it is not designed to stand up to someone who arrives with a pick set, a bump key or a drill. High security locks are built differently. They use tighter tolerances, hardened inserts, more complex pin or sidebar mechanisms, and keys that are controlled so they cannot be casually duplicated at a hardware store kiosk. For many Duarte households, that difference matters most at the front door and the back slider or garage entry.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and David Shar leads the work. We are mobile only, so there is no storefront to visit. We bring the hardware and tools to your property, look at the door and frame you actually have, and recommend a lock that fits the situation rather than the most expensive item on the truck.

In a foothill city like Duarte, the mix of homes is wide: 1950s and 1960s single-story ranch and tract houses, newer condos and apartments near the A Line, and custom homes climbing toward Fish Canyon. Each of these calls for a slightly different approach, and a high security lock is only as strong as the door, strike plate and frame around it. We look at the whole entry, not just the cylinder.

How it works in Duarte

  1. 1

    Talk through your concerns

    Call (323) 997-8867 any time, day or night. We ask what is prompting the upgrade: a break-in attempt, a move, a tenant change, or simply wanting better protection. We also ask about the doors involved and any existing locks.

  2. 2

    Assess the door, frame and current hardware

    On site, we check how the door is hung, the thickness and condition of the door, the strike plate, the screws and the frame. Older tract-home doors often have short strike screws and worn wood that weaken even a good lock.

  3. 3

    Choose the right level of protection

    We explain the options in plain language: pick-resistant and bump-resistant cylinders, drill-resistant hardened inserts, and restricted keyways where key copying is controlled. We match the lock to the door and to how you use it.

  4. 4

    Install and reinforce

    We fit the new high security deadbolt or cylinder, and where it makes sense reinforce the strike plate and frame with longer screws that reach the framing. We confirm smooth operation and proper bolt throw.

  5. 5

    Key setup and handoff

    We cut and test your keys, and can set multiple doors to work on one key. We walk you through how the key system works, how to request additional keys, and what to do if one goes missing.

Need high security locks in Duarte?

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, from a high security deadbolt to a full restricted-keyway system
  • The number of doors, gates or cylinders being converted
  • Whether the door, strike plate or frame needs reinforcement to make the lock effective
  • Whether you want all locks keyed alike or separate keys for different users
  • The number of extra keys or restricted key cards required
  • Time of day and whether the work is a scheduled upgrade or an urgent after-hours visit

Why Duarte chooses us

  • Fully mobile and available 24/7, so an upgrade after a break-in attempt does not have to wait for store hours
  • In business since 1987, with owner and lead technician David Shar involved in the work
  • We evaluate the door and frame, not just the lock, because a strong cylinder in a weak door is a false sense of security
  • We recommend based on your situation and are upfront when a standard quality deadbolt or a rekey is enough
  • Experience with the older tract-home doors common in Duarte, as well as newer condo and custom-home hardware
  • Clear explanation of how key control works so you know who can and cannot copy your keys

High Security Locks across Duarte

Duarte's housing varies block by block, and so does the security picture. In the Butler and Cotter areas, many homes are 1950s and 1960s single-story ranch and tract houses with original wood doors and short factory screws in the strike plates. A high security deadbolt on the front door, paired with a reinforced frame and a matching lock on the back and garage entry, is a common and sensible upgrade there, especially after buying a home and not knowing who holds old keys. Homes in the 91010 ZIP code often fit this pattern.

Further up toward Royal Oaks and the Fish Canyon area, custom foothill homes tend to have longer driveways, side gates, and more secluded entries. After a break-in attempt, owners often want a high security deadbolt along with a better gate lock, and we can make those work from the same key system. Properties near the Fish Canyon Falls trailhead and the hillside streets can feel isolated at night, which makes strong, reliable hardware worth considering. Parts of 91009 and the surrounding foothill streets fall into this category too.

Duarte is also home to City of Hope and a large medical-professional population, many of whom work long or irregular hours and care about the security of both home and small offices. Whether you live near Encanto Park, along Huntington Drive (Route 66), or close to the Duarte Recreational Trail, we reach you from I-210, I-605, Mountain Ave or Buena Vista St. Because we are mobile only, the work happens at your door.

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 Duarte locksmith services

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

High Security Locks in Duarte — FAQs

What makes a lock high security instead of standard?
High security locks resist common attack methods such as picking, bumping and drilling, using tighter tolerances, hardened inserts and more complex internal mechanisms. Many also use restricted keys that are harder to duplicate without authorization.
Do you serve Duarte at night and on weekends?
Yes. Crenshaw Lock Company is a 24/7 mobile locksmith. Call (323) 997-8867 any time and we will talk through what you need.
Will a high security lock help if my door is old?
It helps, but the door and frame matter just as much. In older 1950s and 1960s ranch homes we often recommend reinforcing the strike plate and using longer screws so the lock is not defeated by kicking the door.
Can all my doors use one key?
Usually yes. We can set the front, back and garage doors to one key, and in many cases extend that to a gate lock too. Call (323) 997-8867 to discuss your setup.
I had a break-in attempt near Royal Oaks. What should I do first?
If you can, make sure the home is safe and secured for tonight, then call us. We can assess the damaged area, upgrade the deadbolt and gate lock, and reinforce the entry. Reach us at (323) 997-8867.
Do you have a shop I can visit?
No. We are fully mobile, so we come to your home, office or property in Duarte instead.
Can I get extra keys copied at any store?
With restricted high security keys, typically not. Duplication is controlled so only authorized people can request copies. We explain how this works during installation.
How is the cost determined?
Cost depends on the lock grade, the number of doors, any door or frame reinforcement, key setup and when the visit happens. We discuss the options with you 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