The Pinheads are a gang of male, Caucasian enforcers tied to the Slimelight Club in Manhattan’s party district owned by mob organizer Don Joe Fonti who had used the gang as hired muscle outside of his own bouncers to apprehend Libby on the don’s entertainment until she was rescued by Lulu and an outside interest.
The Pinheads as a whole are a gang of noted 5 members who lack notable powers beyond intimidation and minimal street brawling skills for their otherwise lack of martial arts and tendency to run at any signs of major firepower. They have not been mentioned in comics since the late 90’s.