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Dead locking latch bolt operated by knob/lever from either side except when outside knob/lever is locked by the push or turn button inside. Key outside or operating inside knob/lever releases push or turn button unlocking outside knob/lever except when push or turn button has been rotated to keep outside knob/lever locked. Inside push or turn button must be manually operated to unlock outside knob/lever. Inside knob/lever always operates latch bolt.
Features: Door Thickness: 1-3/8"-2"
• ANSI A156.2 Grade 1, UL Listed 3-hour
• 25 year mechanical warranty, 5 year finish warranty
• Solid brass cylinder, drilled 6, pinned 6
• Removable throughbolts. SFIC prep has fixed throughbolts (without using through-bolts the lock is not Grade 1 compliant)