Thorn manacles

Thorn manacles are a form of manacles used to prevent the cuffed person from using magic.

Lash stated them to be made by faeries, troll-smiths of the Winter Court, and to have been used against wizard for over a thousand years.

There seem to be different accounts for their origin in circulation, some saying they were invented by Nicodemus Archleone, while Harry Dresden once figured them to more likely be inventions of the Red Court.