Yale intros cylindrical lock
The Yale 5418LN Classroom Intruder includes features such as double cylinders that allow locking from inside and out, preventing exposure to teacher and students in an emergency. When locked from either side, exit from the inside is always possible by simply turning the lever. And unlike typical classroom door cylindrical locks, the outside lever will remain locked upon exiting.
For more information, contact Yale at 800-543-3658 or visit www.yalelocks.com.