Setup hook

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Detail from the painting Sabobai and Benaja by Konrad Witz from 1435. It shows a knight wearing a chest armor to which an armor hook is attached
Armor hook on an early modern plate armor (Nuremberg, approx. 1530–35)
Arming hook, drawing by Wendelin Boeheim

Armor hooks are fold-out or permanently mounted attachments on late medieval and early modern breastplates to hook a lance onto so that it remains stable when aiming at the enemy while riding and also prevents it from slipping back when hit. They were placed on the right side of the breastplates.

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Commons : Equipment hooks  - collection of images, videos and audio files