NU-Set 6 x (T-E-26D + 75026D) 4049-3 Entry Lever and Double Cylinder Deadbolt, Set of 6, Satin Chrome na na Imported Combo Set of 6 Entry Door lever Locks and 6 Double Cylinder Dead Bolts in Satin Chrome Finishing All locks keyed alike meaning one key opens all locks!!! A double cylinder deadbolt is operated with a key from both the exterior and interior Adjustable 2-3/8" to 2-3/4" Backset, Fits Standard Door Thickness (1-3/8" to 1-3/4") Double Cylinder Deadbolt: It is locked or unlocked on both sides with a key