Locksmith in Port CreditYour locksmithdown the road in Port Credit

An interchangeable core is a small, self-contained cylinder that slides out of the lock with a special control key and drops back in on a new combination. Look at the keyway: a figure-eight shaped face on a lever or mortise housing is the usual sign. Buildings choose them because a lost key or a staff change is handled by swapping the core rather than taking the lock apart, and a locksmith can carry cores pinned to your system.

Usually, yes. Where the cylinders accept the same style of key blank, each can be pinned to one new combination, so a single key runs the front, back, side and garage doors. A lock from a different keyway family is brought into the group by exchanging its cylinder for a compatible one in the same finish. During the first walk around the property the locksmith reads every keyway and tells you up front which doors can be keyed alike.

One visit usually covers every door on the job. The locksmith brings a range of cylinders and strikes, measures each door's backset and bore, and works through the list in order, front entrance first if a key change matters most there. Having a rough list ready, which doors, and whether they should end up on one key or several, lets the locksmith plan hardware before arriving rather than working it out door by door on site.

Often, on cases that already take a threaded cylinder. Mortise cylinders are made in standard thread sizes and lengths with different cam shapes, and a new one is selected to match the case and the door thickness. That gives you keys cut on a machine and the option of keying the door alike with the rest of the house. A bit-key case has no cylinder to swap; its keys are made on the bench instead.