ARF-GEF wrote:What is an "arrow style" locK?
An Arrow lock is made for the United States of America Post Office and it is a restricted double bitted lever lock. There are laws against owning the key for a private citizen.
from the USPS website:
Arrow Lock:
A special type of brass and steel security lock installed in street collection boxes, storage boxes, apartment boxes, banks of apartment house mailboxes, cluster boxes such as neighborhood delivery and collection box units, and other postal mail-receiving receptacles. The name of the lock comes from an image of an arrow stamped below “U.S. Mail” on the reverse side. A special arrow lock key is used to access the lock.
This google search shows the Arrow keyway and an Arrow key as the first results:
https://www.google.com/search?q=usps+ar ... 4APB3oHQAQ