The AU4608LN 626 is a Grade 2 Cylindrical Lock, with a 2 1/8" bore, and 2 3/4" backset. This 4600LN Series is in a 08 Classroom function. The Classroom function locks and unlocks by key outside, but you can always get out of the space from the inside. The AU stands for an Augusta Lever, and this lock comes in a Schlage C Conventional Core keyed randomly. The Finish is a US26D/626 Satin or Brushed Chrome.