Shrew's fiddle

A shrew's fiddle or neck violin is a variation of the yoke, pillory, or rigid irons whereby the wrists are locked in front of the bound person by a hinged board, or steel bar.

It was originally used in the Middle Ages as a way of punishing those who were caught bickering or fighting.

[2] It was originally made out of two pieces of wood fitted with a hinge and a lock at the front.

[1] A bell was sometimes attached to this portable pillory, to alert townspeople that the victim was approaching so that they might be mocked and otherwise humiliated.

Another version was a "double fiddle," by which two people could be attached together face-to-face, forcing them to talk to each other.