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Can a B580 or B680 be installed with 2 1/8" door prep hole?

Schlage does not recommended the installation of the B680 into a 2 1/8" door prep hole.  The mounting plate has a recess that will fit snugly into a 1 1/2" door prep keeping the lock centered.  If 2 1/8" door prep is used, there is nothing to prevent the lock from shifting which could cause a bind.  (Binding has the potential to become a lock-out/lock-in situation.)

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