Special 2 inch Backset Deadbolt.- Overall latch length 2-15/16 inch 
Replaces: Atrium Door, National Lock, Amerock, Maywood and others
Housing projects: 1-1/2 inch outside and 1 inch inside.
Keyway: Schlage 5 pin Sc-1 Rekeyable cylinder.
Minimum Crossbore: 1-1/2 inch
Cylinder Collar is 2-1/2 inch Diameter
Standard Finish: Polished Brass US3, Satin Chrome US26D, Oil Rubbed Bronze US10B, Antique Brass

Fits up to 2-1/8'' Cross bore hole in door
Single cylinder (keyed exterior and thumb turn on interior)

How to Install Deadbolt for Doors with 2 in Backset (Atrium, Morgan, etc)