Bell Ewart Lock ServicesBulletin 2 of 3Innisfil, Ontario
Broken Key Extraction: what shapes the quote
Usually.

Usually. Laid end to end, the halves show the full set of cuts and identify the blank, and a locksmith reads them with a gauge and cuts a fresh key to those depths on a code machine. That is better than tracing the broken blade on a duplicator, because a worn key copied is a worn key repeated. If a spare or the key code exists, that is used instead.
Where the key broke
A house deadbolt, a knob, an older mortise case, a padlock, a car door and a vehicle ignition each call for different access and different care, and the quote follows the hardware.
How far the locksmith travels
Every call-out includes the drive. A lock on the next street and one at a rural address an hour out are different trips, and the quote includes travel as its own consideration.
How the new key is made
Cutting from a key code or a crisp spare, decoding the two halves with a gauge, or cutting a restricted blank from system records each take different time and stock.