【Function】:There are 6 same keys in total(Keyed alike), and you could used 1 key to open and lock all loacksets. Single Deadbolt means that you can lock/unlock the door by a key from outside and a thumb-turn button from inside 【Application】: The door handle set fits doors with a thickness of 1-3/8 inch to 1-3/4 inch (35mm to 45mm) and is equipped with an adjustable backset of 2-3/8 inch or 2-3/4 inch (60mm or 70mm) 【Installation】: It is easy to install and fits most standard front, back doors.Fit on existing, standard pre-drilled doors,You only need a Phillips screwdriver and a few minutes to install it.please note that the pre drilled diameter is 54mm 【Security】: With ANSI Grade 3 verification, the hardware set exceeds 200,000 cycles ensuring the quality provided to you 【Style】: This combination of door lever and deadbolts, will give your home or rental house a new look, you can use them in contemporary/modern style room，transitional traditional Victorian Colonialism home décor