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If you’re buying a new house using locks that have contractor keys, you absolutely should rekey your locks, if for no reason other than to remove the contractor
by jmpman 7y ago
If you’re buying a new house using locks that have contractor keys, you absolutely should rekey your locks, if for no reason other than to remove the contractor key aligned pins. After a quick analysis, my entire subdivision (100+ houses) could be opened with just 6 specifically crafted keys, and each of your neighbors has enough information in their locks to determine how to make those keys.
- jaclaz 7y agoI don't know where you live, but at least here (Italy) locks that have "contractors keys" can only be opened with contractors key until the "proprietor" key is used once (with an "installing maneuvre"), and then contractors key won't work anymore. What you describe is more like the master key systems (used as an example in some hotels) where there is generally a three level (but there can be more) set of keys, the manager's one (that opens all doors/locks), the maid one (that opens - say - all doors/locks in a floor) and the actual customer one where each key only opens a single lock.