Save 25% off MSLP Available in Passage, Privacy, and Dummy function The passage function is non-locking for general use. It is used on most interior doors when privacy is not a concern. Each Passage Set includes a pair of doorknobs with 8 mm spindle, two backplates, a 2 3/8" (2 3/4" backset available) backset passage latch, strike, and screws. Privacy: This locking function features a push-button lock for bedroom and bathroom privacy. It can be unlocked from the outside in case of emergency. Each Privacy Set includes a pair of doorknobs with 8 mm spindle, two backplates, a 2 3/8" backset (2 3/4" backset available) privacy latch, strike, and screws. Dummy Function: A non-functioning pair of knobs and backplates for use on non-latching doors. For either back-to-back or individual mounting. Includes a standard spindle and two dummy spindles. Locksets are also available with functional skeleton key mortise locks.