Who ever said a girl cannot punch some one out with their hearts! If you were to buy this decal we all know everyone would think twice before messing with you! This car decal shows that you mean business.Brass Knuckle decals are one that show everyone who is boss around here! Brass Knuckle Decals for use outdoors on cars, windows, or other surfaces. Vinyl used for decals is high quality outdoor rated vinyl. All vinyl decals are made in the USA.