Locks are usually re-keyed to build master-key systems, make a set of locks share a common key, or eliminate compromised keys. Sometimes worn pins are replaced with new pins if the old pins become too short to reach the shear line. The shear line is the thin line shared by the lock plug and its cylindrical housing. If a pin sits flush with the circumference of the plug it will allow lock rotation.
you can buy a rekey kit Lock cylinders use different length pins in different combinations to create relatively unique key bitting. Most keys have 5 cuts from bow to tip. If a key has 5 cuts, the lock has 5 pins. Different brand locks vary in many small ways, this is most true when servicing them.
Many manufacturers like Schlage & Weiser Locks
with many other brands offer product-specific manuals. Information disclosed in manufacturer manuals is often otherwise difficult to find, as is locksmith material in general.
we hope the post makes sense to you in a matter to understand better how locks work and rekey the cylinder
we can provide the service to any type and security level even old locks.
Protect Locksmith Here to help 647-479-9541