Vic Mensa was riding a motorcycle in Glendale, CA earlier this month when police saw him make an unsafe turn.
An officer pulled over Vic, and at some point during the stop, patted him down. We're told the officer found the brass knuckles in Vic's pants pocket.
In most states they are considered for self-defense purposes, but they're banned in California.
Police booked him for felony possession of brass knuckles, and he was later released after posting $20,000 bond.
Police decided not to ticket him for the alleged unsafe turn.