Holy Spiritus Constantine Brass Knuckle Paper Weight. Our Holy Spiritus Constantine Brass Knuckle Paper Weight's help you insure justice is served, by your hand or in your office.  Made of a antique brass finish Steel and featuring the four knuckle tops they are of premium quality. Many martial arts specialists use these paper weights in training and for self-defense purposes. These large size Constantine brass knuckles movie replicas of the ones used by John Constantine. These steel knuckles are thicker and heavier than most knuckles.