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How Do I Change the Key for My Door Lock? A DIY Guide by a Real Locksmith.

Writer: Emily BravermanEmily Braverman

Whether you're settling into a new home or want to boost your security, rekeying your lock is a wise choice. Not only does it save money, but it also gives you control over who has access to your space. This guide will walk you through the steps of rekeying your lock using a rekeying kit. Let's get started!






Residential door after rekey services from Instant Lock and Key
Instant Lock and Key technician repairing residential lock in Maple Grove, Minnesota.

Additional Considerations


Before jumping into rekeying, it's important to know that not every lock can be rekeyed. Certain older models or lower-quality locks may lack this option. Always check the manufacturer's details or look up online resources to confirm your lock's capability.


Why Rekey a Lock?


Rekeying a lock is a smart approach to security. This process changes the lock's internal workings so that a different key can open it. Here are some specific reasons a locksmith would recommend rekeying:


  • Lost Keys: Approximately 23% of people lose their house keys at least once a year.

  • Roommate Changes: If you've had someone move out, you may want to ensure they can no longer access your home.

  • New Homeowners: Nearly 75% of home buyers worry about unauthorized access from previous owners or realtors.

  • Ideal Situations for Rekeying a Lock:

    • After a break-in attempt

    • Ensuring all locks work with one key

    • Lost or stolen keys

    • Moving into a new home

    • When locks are still in good condition


Rekeying is generally much cheaper than replacing an entire lock system.



Residential door lock after professional locksmith services.
Residential door after rekey services from Instant Lock and Key


What You’ll Need


Before getting started, gather these essential materials to ensure a smooth rekeying process:


  • A rekeying kit that fits your lock brand

  • A Phillips screwdriver

  • A clean flat surface to work on

  • A new key for the lock


Step-by-Step Guide to Rekeying Your Lock from a Professional Locksmith


Ready to dive in? Follow these steps to rekey your door lock.


Remove the Exterior Knob


Begin by using the remover tool from your rekeying kit to press the clip and take off the knob from the shank. You usually do this by inserting the tool into a small hole near the base of the knob and applying some pressure. Keep your workspace organized to prevent losing any small parts during disassembly.


Remove the Cylinder Lock


After the knob is off, turn the key a quarter-turn in the opposite direction. This will allow you to remove the key and pull out the cylinder from the lock housing. If the cylinder feels stuck, double-check to ensure the key is turned correctly.


Remove the Key Plug


Next, use the pusher device from your rekeying kit to carefully slide the key plug out of the housing. Accessing the inner components of the lock is essential for this process.


Remove the Old Pins


Once the key plug is out, drop the old pins onto your clean surface. This keeps them from rolling away and makes it easier to replace them with new pins.


Insert the New Key


It's time to insert the new key into the plug. This key will determine how you position the new pins, so be careful to follow this step exactly.


Insert the New Pins


Using the tweezers from your kit, place the new pins in the specific order shown in the provided chart. This order depends on your lock brand and is crucial for proper functioning.


Reassemble the Lock


With the new pins in place, reinsert the plug back into the cylinder. Snap the clip ring back on and carefully reattach the cylinder lock to the knob. Ensure everything fits properly to guarantee optimal lock functionality.


Test the Lock


Now comes the exciting part! Test the lock with your new key to ensure it turns smoothly. If the lock feels stiff or does not turn, check that all pins are correctly positioned.


Purchasing a Rekeying Kit


You can find rekeying kits at your local hardware store if you know your lock's make and model. Many home centers offer these kits at affordable prices, typically ranging from $15 to $30. Some stores might even provide rekeying services when you buy a lock, so don't hesitate to inquire.


Final Thoughts


Rekeying your lock can be a fulfilling DIY project that enhances your home’s security. If you feel like you cannot rekey the lock yourself and rather hire a professional, call Instant Lock and Key today! We serve the Twin Cities, Minnesota and its surrounding neighborhoods.




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