Cylinder only. The 9PBO03 is a rim cylinder for Dormakaba 91, 93 and 9400 Series exit trim in the nightlatch function, and it ships without a trim plate or lever. If the existing trim housing is already on the door and you only need to rekey or replace the cylinder, this is the right part. If the trim itself is damaged or missing, you need the full exit trim assembly instead.

It is a 6-pin Schlage C keyway cylinder. If your building is already keyed in Schlage C, a locksmith can pin this to your existing change key or master key without any adapter. If your system runs a different keyway or a restricted proprietary key, this cylinder will not accept those keys and you need a cylinder cut to that keyway.

It is built for Dormakaba 91, 93 and 9400 Series exit trim. Rim cylinder tailpiece length and cam configuration vary by device manufacturer, so treat this as a Dormakaba part and order the matching cylinder from the device maker if your exit hardware is Von Duprin, Precision or another brand.

Nightlatch means the outside is key access only. Turning the key retracts the exit device latch so you can pull the door open; there is no outside lever or knob, so the door stays locked from the outside at all times. Inside, the exit device always allows free egress. It is the common choice for rear service and stair doors where you do not want anyone entering without a key.

Commercial. The 9PBO03 is a Grade 1 exit trim cylinder, which is the heaviest ANSI/BHMA duty class, and it is catalogued for commercial use. That makes it appropriate for schools, healthcare, multi-family common doors and any high-cycle exterior opening.

Yes, that is a common use for it. Because the 9PBO03 uses a 6-pin Schlage C keyway, a locksmith can pin a batch of them to one master system so a single key opens every 91, 93 or 9400 Series exit trim on the property. Keying is done at the cylinder, not the trim, so mixed door types across the building are not a problem as long as the exit hardware is Dormakaba.

630, satin stainless steel. That is the standard commercial finish on most Grade 1 exit hardware, so it will blend with existing 630 trim and push bars on adjacent openings. It is the only finish this cylinder is built in, so if your other doors are dark bronze or brass you will see the difference at the cylinder face.