Steel wire spiral shell set (call silk set, spiral shell suit, whorl to expand set too) is a kind of new-type interior whorl fastener, can imbed the metal or forms the high strength on the nonmetallic materials, decreases the standard whorl with interchangeability wear-resisting, can be used for repairing the interior whorl hole worn and torn or damaged. The set of spiral shell of steel wire is with the cold-rolled accurate spiral coil that formed of rhombus silk, interior whorl concentric body, one of its' end have along radial crooked installation handle.