The Accentra (Formerly Yale) MO5308LN-626 is a grade 2 cylindrical lock that has a 2 1/8" bore, a 2 3/4" backset. The MO stands for Monroe lever, 08 is a classroom function key locks/unlocks lever always free passage from the inside out. 626/US26D is a Satin Chrome Finish. These come Schlage C Conventional core keyed random with 2 change keys per lock.