Ap postel mail gurd kee

I think you meant to ask "What is the postal mail guard key?"

The postal mail guard key is a specialized key used by postal workers to open and close the mail guard, which is a metal or plastic cover that protects the mail sorting machines and mailbags from damage and tampering.

The mail guard key is typically a long, flat key with a specific shape and size that fits into a corresponding slot on the mail guard. When inserted and turned, the key opens the mail guard, allowing postal workers to access the mail sorting machines and mailbags.

The postal mail guard key is an essential tool for postal workers, as it enables them to perform their duties efficiently and securely.