For non-USPS delivered sites, commercial equivalent of USPS 306D lock, 90 degree CCW rotation 

Application:
These new postal locks are for private delivery postal mailboxes only in colleges, universities, commercial buildings, mail / parcel centers. They are direct drop in replacements for original USPS locks. Interior, pedestal-mounted or in-wall boxes. Screw mounted. Hardware not included. Commercial equivalent of USPS 306D.

Operation:
90° counterclockwise cam turn to open. Key removable in locked position only.

Keying:
Available keyed differently only (4,000 changes). Key blank part number D4400.

Packaging:
Supplied with cam assembled and three keys.