Possible Clues:

• Brass item that enhances a punch
• Fist reinforcement used in hand-to-hand combat
• Fist guard/weapon
• Metal hand covering used in a violent attack
• Weapon attached to the fist
• Thug's hand-held weapon
• Weapon in fist-fighting
• Metal weapon worn on fist
• Duke's fitting executed 'rearrangement' of dentures? Bad luck, packing this
• Illegal hand weapon