A hard fall sports injury or a fistfight can also cause this injury. Brass knuckles and the law. Traditional Brass Knuckle Rose Tattoo Sketch By Ranz Next use a power drill with a 1 8 inch bit to drill holes along the outline leaving no more than 1 16 inch between the holes. Brass knuckles drawing on hand . Bruised knuckles are often caused from blunt trauma to your finger or hand. Brass knuckles where originally made for hand to hand combat to inflict more pain and to tear or puncture the skin easily. The punch force behind a hand using brass knuckles is a lot more concentrated which is why more pain and damage is inflicted to the victims face. Brass knuckle tattoo knuckle tattoos hand tattoos self made tattoo self defense weapons brass knuckles combat knives knife drawing cool knives product design cold steel ideas tatoo brass knuckles new brass knuckles in the shape of handcuffs with classic skull. Once you re happy with the design trace it onto a 1 2 inch thick piece o