BALL KNOB COMMERCIAL CLASSROOM DOOR LOCK
Either knob operates latchbolt unless outside-knob is locked by key - inside knob is always-active - key unlocks outside knobBumpStop(TM) technology - bump resistant cylinder6-pin Schlage C compatible cylinder is standardMeets ANSI/BHMA A156.2, Grade 2 standardsHas 3 hour UL fire rating - Box packedComes with 2-3/4" Fixed Backset LatchKeyed KA4