Other Dimensions:

Diameter of the Large Bore Hole (for the Spindle):
Diameter of opening for the flat spindle (aka "tail piece") 1″ to 2-1/8″

Distance From an Existing Deadbolt:
To install this lock underneath an existing deadbolt, allow at least 3-5/8 inches from the bottom of the existing deadbolt to the top of the large hole for this lock. call for details
To install this lock above an existing deadbolt, allow at least 3-5/8 inches from the bottom of the existing deadbolt to the top of the large hole for this lock call for details