Lock for letter box has hook-shaped lock whose outer end fits over mounting on inside of box wall to prevent flap from opening, lock swiveling downwards to allow flap to open

摘要

The lock for a letter box has a hook-shaped lock (3) whose outer end (5) fits over a mounting (7) on the inside of the box wall (2), preventing the flap (1) from opening. The lock swivels downwards to allow the flap to open.