Guides
How locks, car keys and safes work, in plain English.
Short explanations from a working locksmith. Free, and nothing to sign up for. Each one points to the hands-on workshop it goes with, if you'd like to try it yourself.
How a pin tumbler lock works
How one key turns a lock and another doesn't, and why rekeying works.
CAR KEYSWhat a transponder key is
Why a key that's only been cut can turn in the ignition and still not start the car.
CAR KEYSCan you program your own car key?
Sometimes. What decides it, and what to check before you buy a key online.
LOCKSRekey or replace a lock?
Which fix fits your problem, and what a rekey involves.
DOORSWhy a door won't latch, and why it usually isn't the lock
Most of the time the lock is fine and the door has moved. How to find out.
COMMERCIALHow a master key system works
How one key opens many doors while each door keeps its own key.
ACCESS CONTROLHow a keypad and an electric strike open a door
Reader, controller, lock and power, and what happens when the power drops.
SAFESHow a safe combination lock works
How the dial and keypad types work, and what to try when a safe won't open.
AUTO ELECTRONICSWhat circuit board repair on a car module involves
What it means to work on a car's computer at the board level.
CHOOSINGOne-on-one or a group class? How to choose
The honest trade-offs, and the questions to ask any provider before you pay.
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