The PB5425LN 626 is a Grade 1 Cylindrical Lever Lockset. The lock is a 5400 series and the 25 is a Privacy Function for lavatory or other privacy doors. Either lever operates a latch bolt (except when the outside lever is locked by the inside pushbutton) Button automatically releases by turning the inside lever or closing the door. The door can be unlocked, when necessary, by operating the outside turn button. The PB5402LN has a 2 1/8" bore 2 3/4" backset. This lock is non-keyed and comes in a US26D/626 Brushed Chrome Finish.