Schlage B571 Door Bolt Occupancy Indicator, Satin Chrome Door range: 1-3/8″ to 1-3/4″ thick (35 mm to 44 mm) standard. Backset: 2-3/8″ (60 mm) or 2-3/4″ (70 mm) adjustable backset standard. 5″ fixed set also available. Crossbore: 1 1/2″ or 2 1/8″ Adapter
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