WHAT IS NON KEYED LOCK?

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The S-Series and S200-Series outside keyed spindle was redesigned in September 2008.   For locks manufactured BEFORE September 2008    The S and S200 lever cylinders required cy...
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...
To convert the Von Duprin 9975NL(Night Latch or Storeroom) to 9975L (Classroom) exit function follow these steps (Note: the mortise lock is shipped as Night Latch from the factory): Turn the NL ...
To convert the Von Duprin 9975L to 9975NL exit function follow these steps (Note: the mortise lock is shipped as Night Latch from the factory): Turn the NL screw on 7500 mortise lock counter clo...