Sure-Loc Hardware AR107/DB201 FBL Arapaho Entry Knob and Deadbolt, Flat Black Contemporary Series Adjustable 2-3/8 - 2-3/4 backset Entry Keyed Alike In Sets Of Four Used on exterior doors Hollow, egg-shaped knob Adjustable 2 3/8"-2 3/4" (60-70mm) backset Fits doors 1 3/8'-1 3/4" (35-45mm) thick