An industrial piercing (North America), sometimes called the " bar " (UK/IRL) or construction piercing, is any two pierced holes connected with a single straight piece of jewelry (compare to orbital piercing); however, it typically refers to a double perforation of the upper ear cartilage specifically. Two piercings are made, one fairly close to the head (anti-helix piercing) the second further down the cartilage, on the opposite side of the ear (helix piercing).