Product Information Description Measuring Guide Other Details Falcon D Series Grade 1 Classroom Deadbolt Deadbolt is thrown or retracted by key outside. Inside thumbturn will only retract bolt. Bolt automatically deadlocks when fully thrown. Falcon Door Hardware - How To Door Swing – Left Hand Or Right Hand? Choosing the Right Door Stop Single Cylinder Or Double Cylinder Need It Fast? We Can Help See Our International Shipping Options Request A Quote Today Falcon D Series Grade 1 Classroom Deadbolt is perfect for classroom doors. Teachers can ensure students are safely locked in the room if danger lurks while preventing mischievous students locking the teacher out of the room.