PDQ Grade 2 SD Heavy Duty Non-Handed Commercial Cylindrical Lever Lock Satin Chrome Finish (Passage) Latch bolt operates by lever either side at all times. 3 hour fire rated UL latch,and 4-7/8" ASA Strike Included. ADA Aproved (American Disabilities Act) Lockset fasteners to be concealed with through-the-door through-bolt attachment outside the 2-1/8" door preparation. Through-bolts to be removable, if desired. 5 Year Limited Warrenty