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Locksmith Guarantee

Residential & Commercial Lock Manufacturers

Lock Hardware Brands We Service Across Maryland

Independent mobile rekeying, repair, keypad calibration, and hardware replacement for 15 major residential, commercial, and high-security lock manufacturers.

  • MD Locksmith License #507
  • BBB Accredited (A+ Rating)
  • ALOA & Chamber of Commerce Member
  • Mobile Dispatch Base: Greenbelt, MD
  • Scope & Price Reviewed Before Work
15 Supported Manufacturers

Select Your Door Lock Brand for Compatibility & Service Guidance

Whether your property uses rekeyable residential deadbolts, smart touchscreens, Adams Rite storefront deadlatches, or high-security cylinders, inspecting the exact series and door preparation prevents mismatched hardware.

Schlage Lock Service

A Schlage request may involve a mechanical cylinder, a keypad, or a connected lock. Identify the model and explain whether the key, latch, keypad, or app is failing. These are different parts of the entrance and should be assessed separately.

Kwikset Lock Service

Tell us whether your Kwikset lock has SmartKey branding, a conventional cylinder, or electronic access. SmartKey and conventional cylinder rekeying are different processes, so the product must be identified before the work is planned.

Yale Lock Service

For Yale hardware, separate a mechanical lock problem from an electronic access problem. Explain whether the door opens with an available key, whether the keypad responds, and whether the latch moves freely when the door is open.

Baldwin Lock Service

A Baldwin entrance may be chosen as much for its handle and finish as for its locking function. Send photographs of both sides and the door edge, and explain whether preserving the visible hardware is important to your repair.

Medeco Lock Service

Medeco key systems can have specific authorization and duplication arrangements. Identify the installed system and keep any owner or key-control documentation available. A request for a duplicate key is different from repairing a door or replacing a damaged cylinder.

Mul-T-Lock Lock Service

For a Mul-T-Lock request, identify the cylinder or key platform and explain whether the task is repair, a key-access change, or obtaining an additional key. Keep any key card and ownership documentation associated with the system.

ASSA ABLOY Lock Service

ASSA ABLOY identification alone may not specify the actual product on a door. Provide the brand, model, and function shown on the installed hardware, along with photos of the lock and door edge.

Corbin Russwin Lock Service

For Corbin Russwin hardware, record the lock function and any visible series or model information. A door that should permit passage, remain locked from one side, or work within a master-key system has different requirements.

Sargent Lock Service

A Sargent service request should identify the actual device and how it is intended to operate. Describe the key action, handle behavior, and whether the door closes and latches correctly before requesting a replacement.

Arrow Lock Service

For Arrow locks, share photographs of the handle, cylinder, and door edge with any model markings. Explain whether the key is missing, the handle is loose, or the latch fails to engage.

Defiant Lock Service

A Defiant lock that is difficult to use may have a key, latch, mounting, or alignment problem. Explain whether it operates normally with the door open and whether the fault began after installation or developed over time.

Weiser Lock Service

Identify the Weiser product and any rekeying or electronic-access features shown on its label. Tell us whether a working key remains and whether the concern is changing access or correcting a mechanical fault.

Master Lock Lock Service

A Master Lock request should identify whether the item is a padlock, combination lock, or another product and what it is securing. Provide model markings and proof that you are authorized to arrange access.

RR Brink Lock Service

For RR Brink hardware, provide the exact model, site contact, and operating symptoms before requesting service. A specialized or institution-controlled locking system should be handled within the property's maintenance and authorization procedures.

Adams Rite Lock Service

Adams Rite deadlocks are associated with narrow-stile aluminum and glass door applications. Identify the installed mechanism and describe whether the problem is the cylinder, bolt or latch, door alignment, or related access hardware.

Yale touchscreen smart deadbolt installed on white French double doors
Yale touchscreen deadbolt mounted on double French doors where active-leaf alignment is critical.
Commercial satin chrome mortise lock cylinder and lever handle on an office door
Commercial mortise cylinder and heavy-duty lever trim installed in a prepared door pocket.
Experience & Trust

Licensed Field Standards & Accountability (Lock Brand Service)

Every mobile technician dispatched from our Greenbelt base (5442 Stream Bank Ln, Greenbelt, MD 20770) works under Maryland Locksmith License #507, BBB A+ standards, and ALOA trade practices (meet our business standards). Our mobile pinning benches carry brass pins, springs, followers, and cylinders matched to major residential and commercial keyways.

MD Locksmith License #507Documented ID and property-authority checks prior to opening or key changes.
BBB A+ & ALOA MemberBetter Business Bureau accredited and Associated Locksmiths of America member.
Mobile Van WorkshopStocked with pinning kits, key cutters, cylinders, strikes, and OBD diagnostics.
Upfront Scope ApprovalHardware condition, options, and total price reviewed before work starts.

See documented installations on our work gallery or check homeowner and business feedback on customer reviews.

Mobile locksmith workbench with precision brass pinning kit and key blanks
Precision pinning kit and key blanks inside our mobile service unit for on-site cylinder rekeying and master-keying.
Hardware Brand FAQs

Questions About Lock Brands & Keyways

Are you an independent locksmith or a manufacturer-owned dealer?

Locksmith Guarantee is an independent licensed Maryland locksmith (MD License #507). Brand names identify hardware compatibility; restricted/carded factory keyways follow issuer rules.

Can two different lock brands on my house share the same key?

Only when both locks use the exact same keyway profile (for example, two SC1 C-keyway cylinders). Standard Schlage SC1 and Kwikset KW1 cylinders cannot share one key without swapping an incompatible cylinder.

What photos help identify my lock brand and model before a visit?

Send clear photos of the exterior trim, interior thumbturn/lever, the metal latch faceplate on the door edge, and the front of the keyhole.

Service Request

Schedule Lock Hardware Brands We Service Across Maryland Service

Include your street address, affected lock or vehicle details, and current symptoms (omit private PINs or sensitive ID scans). For priority availability, call (240) 931-0762.

    Direct Mobile Dispatch Across Maryland & Washington D.C.

    5442 Stream Bank Ln, Greenbelt, MD 20770 • MD License #507 • locksmithguarantee1@gmail.com