Easy Installationthe Entry Door Lock Set Can Be Installed By One Person With Guaranteed Fit On Standard Pre-Drilled Doors. All You Need Is A Screwdriver. Double Protectionequipped With Three Identical Keys To Open Two Deadbolt Alike Door Locks, Which Is Portable And Gives You Double Protection, Double Keyed Outside And Two Knobs Inside, So That You Can Lock Or Open The Door Without A Key When You Are At Home. Fit Most Standard Doorscomes With Two Adjustable Metal Universal Door Latches(2-3/8" Or 2-3/4"), Fits Doors 1-1/4" To 1-3/4" In Thickness, As Well As Compatibility With Both Right And Left Handing Doors. Suitable For House, Apartment, Office, Etc. Zi