what is vestibule lock function

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Conversion kits are available to convert many popular functions.Conversion kits manufactured on or after January 30, 2017 will have the new enhanced ND spring cage, lever, plunger and buttonCo...
For all available ND Series Conversion Kit part numbers, click here.
See transformation document.
Apartment Corridor Lock function is defined as a lock where the latch bolt operated by lever from either side, except when outside lever is made inoperative by a stop or mechanical means other than...
A flat head screwdriver can be used or the 35-250 emergency key.
CLASSROOM LOCK: A lock that locks and unlocks the outside lever with a key.  Inside is always free egress. ENTRY LOCK:  A lock that locks and unlocks the outside lever with button/turn on the insi...
Standard and Full Size I/C mortise cylinders on the L9485 and L9486, Hotel or Restroom Locks, use the concept of a ward ring to lock out all change keys once the deadbolt is thrown. Instead of a fu...
HANDINGA stop ring is installed on the right side for right hand operation and on the left side for left hand operation.  Right hand shown below.