Fetterlock

Fetterlock is a sort of shackle which is a common charge in heraldry, often displayed in a way resembling a padlock.

King Edward IV used a heraldic badge consisting of a fetterlock and a falcon. This was originally the badge of the first Duke of York, Edmund Langley, who used the falcon of the Plantagenets in a golden fetterlock. This was also used by his grandson Richard of York, who displayed the fetterlock opened.

Fetterlocks feature in the crests of the Wyndham family of Norfolk and of the Long family of Wiltshire.