Made of high quality stainless steel, HiyaHiya Steel Interchangeable Needles feature keyless screw-on connections with flexible cables, near perfect joins and a slick but not too slick, smooth finish. They are lightweight to handle and will warm quickly to the hand. Increase your flexibility by purchasing extra needle tips for your HiyaHiya interchangeable needles. HiyaHiya 5 inch interchangeable tips are comprised of a 4.25 inch tip and a .75 inch metal connector for a combined length of 5 inches.