difference between AL and ND latchsets

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ND93PD (ANSI F88) Vestibule LockLatch retracted by key from outside when outside lever is disengaged by key in inside lever. Inside lever is always unlocked.  ND95PD (ANSI F110) Classroom Securit...
The old D-Series Lever used a standard lever insert similar to the pre-2002 AL-Series standard lever insert.  The old D Lever insert was smaller than the AL and the two were not comp...
Indicator not extended Indicator extended
The indicator on a cylindrical hotel lock is a small pin that projects outward from the face of the cylinder plug (Figure 1) when the inside push button is depressed.  When this pin is pr...
The D series is knob trim and the ND series is lever trim.
ND50PD (ANSI F82) Entrance/Office Lock  Push-button locking. Push-button locks outside lever until unlocked with key or by turning inside lever. Inside lever is always free for immediate egress. ...