The brass knuckles are golden colored and have four holes on them to put your fingers in. On the knuckles enochian sigils are carved on them and they glow when activated.
In Keep Calm and Carry On, Ms. Watt attacks Dean Winchester and Castiel after they attempt to rescue Sam Winchester. She arms herself with a pair of brass knuckles with Enochian sigils carved on them. They proved effective as Ms. Watt was able to overpower and beat Castiel as well as Dean. She was later killed by Mary Winchester while she was distracted. Before disposing of her body, Dean took her brass knuckles.
In Twigs & Twine & Tasha Banes, Arthur Ketch tells Mary that they only work on angels and will have no effect on him as he's not an angel. Mary promptly kicks him the crotch then punches him in the face with the brass knuckles, telling Arthur that "brass knuckles are brass knuckles."
In All Along the Watchtower, Mary Winchester used it against Lucifer. Wielding the knuckles, Mary is able to hurt Lucifer and knock him through a rift into an alternate reality, trapping him, but not before Lucifer pulls her through with him.
In Lost & Found, it was equipped on Mary but wasn't used.
It is unknown what became of Mary's brass knuckles after she and Lucifer were imprisoned by Michael.
- Season 12
- Season 13
- These brass knuckles are very similar to the ones featured in Constantine, but instead of being effective against angels, the ones in Constantine are effective against demons.