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ASSA ABLOY CYL4® technology allows door and window locks to be keyed alike and operated by just one C4 door key.
Entrance doors, laundry doors, patio doors, patio bolts, window locks, screen doors and even padlocks for sheds and gates will all work with one key, providing consumers with a convenient home locking solution.
There is no legal protection for the ASSA ABLOY C4 One Key System.