Keyed Alike Function5 Locks per package(for five doors) with 15 same keys; Lock/Unlock with the same keys for several doors. Entry Door KnobsCan Lock outside with the key and lock inside by the turn button. Best use for Exterior Door/Front Door, Commercial/ Residential, offers convenience and enhanced security for you and your family. For All Standard DoorDoor Handles are suitable for all USA Standard doors. A Good Replacement for upgrade old door or new house installation(Recommended to buy with other function) Easy Installation Easy to install with all accessories included. The easy installation makes for a one-person project. It fits both right and left handled doors More FeatureAdjustable latch to fit 2 3/8" or 2 3/4" backsets. Fits on 1 3/8" to 1 3/4" thick doors.Confirm with ANSI Grade 3, Exceeds 200,000 cycles