Narrow Plate Sets
A lever/knobset with a backplate that does not lock. Passage function sets are used on closet and hallway doors.
A lever/knobset with a backplate that can lock from the inside with a push button or turn piece to allow privacy. Privacy function sets are used on bedroom and bathroom doors.
Single mounted lever/knob with backplate that performs no function. Single Dummy Sets are used on pantry and hallway doors in association with a ball catch.
Double mounted lever/knob with backplate, one on each side of the door. Dummy Sets are used on pantry and hallway doors where a push/pull could occur from either side. A Dummy Set is used in association with a ball catch.
A Deadbolt and Latchset combination where the deadbolt is locked and unlocked by a key on the exterior and by a turn piece on the interior of the lockset. Single Cylinder locksets are the most common used in residential applications.