What's the concept of steal wire spiral shell set?
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 .
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