An inustrial piercing, sometimes called scaffold piercing (UK) 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). A straight barbell is inserted through the first piercing from behind the ear, travels diagonally across the front of the upper cartilage, then goes through the second piercing, and is secured with a screw-on bead behind the second hole.