Keycard Lock

A keycard lock is a lock operated by a keycard, a flat, rectangular plastic card. The card typically, but not always, has identical dimensions to that of a credit card, that is ID-1 format. The card stores a physical or digital pattern that the door mechanism accepts before disengaging the lock.

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Source: Wikipedia · Image: Wikimedia Commons · Public domain

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The lock-grade and safe-rating figures throughout this site are drawn directly from the published ANSI/BHMA A156 and UL 72/687 standards — see the ratings reference. Calculators run real math, not AI estimates; guides and articles are written and edited in-house.