The average do-it-yourselfer can approach lock installation with ease. Estimate about 15 minutes for the installation of an Entry, Deadbolt, Passage, Privacy, or Dummy. An Entry Handleset can be installed in approximately 30 minutes. When installing a handleset or an entry lock with a deadbolt on the same door, take the time to align the locks so that the deadbolt locks freely when the door is shut normally.NOTE: Doors with pre-drilled holes contribute to ease-of-installation. If a door is not pre-drilled, it may be prudent to have a qualified vendor or installer drill and mortise the door for you.