Nonlocking. Ideal for closets and rooms where locking is not needed. Performance complies with ANSI (American National Standards Institute) A156.2, 1996, Series 4000. Grade 2. UL (Underwriters’ Laboratories) rated. 3 hour fire door. Door range: 1-3/8″ – 1-3/4″ standard. Backset: Universal latch standard, fits either 2-3/8″ or 2-3/4″ backsets. Limited lifetime warranty.