Lever handle is shaped to fit the hand with a concave thumb-rest portion  that tends to keep knuckles and thumb safely away from the jamb, even on a short backset narrow stile. Designed to operate latches by a natural downward hand movement, these handles incorporate an activator cam disc that mounts on the handle escutcheon and fits solidly into the cylinder hole of the latch. Not intended for use as a door pull.

Adams Rite Deadlatch Handle Spec Sheet