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Standard Duty Commercial Entrance/Office Knob Lock
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The Corbin Russwin CK4451 Entrance knob is a Grade 2 standard-duty knob lockset. It is the ideal knob lockset for standard commercial and residential applications. Entry -Pushing turn button in locks outside knob, requiring use of key outside to unlock. Turning inside knob unlocks outside knob. Pushing in and turning button locks outside knob, requiring key at all times. Inside knob always free but outside knob remains locked until button is manually turned to unlocked position.
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