Helix piercings are located in the outer edge of the ear and are usually placed between the middle and top of the ear. Helix piercings at the top of the ear are also known as pina piercings, while helix piercings near the middle of the ear are also known as auricle piercings. 1  Show More Helix Jewellery ».ndustrial piercings consist of two piercings along the outer ear rim linked by one long bar. They can be placed either straight across the ear or at an angle. In different parts of the world the term industrial piercing can refer to both vertically placed piercings and horizontal piercings.