Master Lock DSC0532D Commercial One-Sided Cylinder Deadbolt, Satin Chrome
Commercial grade locksets are engineered to provide years of dependable service in demanding commercial industrial environments. Replaces all brands of commercial door hardware.  deadbolt is locked and unlocked only from the inside by turning the thumb turn.  Does not have a keyed cylinder.  Deadbolt latch - 2-3/8-Inch to 2-3/4-Inch with 1-Inch throw and hardened steel roller to resist sawing.