The Rockwood 550 Lever Extension Flush Bolt Is For Fire Rated Hollow Metal Swinging Doors measuring up to 4’w x 10’h rated up to and including 3 Hours. 550 Lever Extension Flush Bolt 3/4″ bolt throw, 3/4″ rod backset. 12″ rod length (center of the face to bolt end retracted 1-1/2″ adjustable bolt head. Call For Pricing For Other size rods available are 18″, 24″, 36″, and 48″ Use #570 Dust Proof Strike to prevent dirt blocking the bottom strike.
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