The Yale 5400 series is a grade 1 lock. Its used in high traffic buildings like schools, hospitals, office & any door that is used frequently. 

You can use the 5400 series on classroom, entrance, storeroom, passage, privacy, closet & service doors that need grade 1 security. 

Need a Grade 2 Lever Lock? Check out the Yale 5300 Series Locks.

Yale 5400 Series Catalog.