FAQs
What is the backset for the Alarm Lock Model 250, 260, 700, 710?
For a single door installation, the backset is 2-¾", measured from the edge of the door to the center of the 1-¼ rim cylinder hole shown on the installation template (part #P5026) supplied with the unit.
If the doorstop on the jamb extends more than 5/8", you must adjust the backset by adding this additional distance (that which exceeds the standard doorstop of 5/8") to the standard 2-¾" backset.
Additionally, if the gap between the edge of the door and the jamb is greater than 3/16", you must subtract this additional gap from the standard 2-¾" backset.