These can be keyed with CORMAX cores. The Cormax key will fit the standard cores, but the standard key will not fit the Cormax. You would put the Cormax on critical doors ( outside doors, money rooms, stock rooms etc, but put standard cores on standard doors such as restrooms, garbage dumpsters, etc).
Order the number OF standard cores you need, then order CORMAX cores from my other listings, we can discuss the keying and keys once the order is placed.
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Flat usps shipping fee
Buy 1 or many for the same fee.
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I have as many as 100 cores