The Sargent 28-60-10G05-LP Cylindrical Lever Lock Entrance Office Function is a Grade 1 commercial lever lockset designed for added security and convenience. This Grade 1 cylindrical lever lock is ideal for use in institutions, schools, offices, healthcare, and other areas requiring extra security. With a 2-3/4" backset and 4-7/8" strike, SFIC Interchangeable core, and featuring an L Rose and P Lever, this reliable and durable lockset ensures trustworthy operation in any demanding environment.