Insulator spool dị alaIhe mkpuchi spool nwere ihe karịrị ụlọ nche anwụ abụọ.A na-ejikọta onye na-eduzi ya n'etiti ụlọ nche elu na nke dị ala, na etiti ahụ na-agbawa.A na-ejikọta ya na ogwe aka obe ma ọ bụ splint na mbọ threading.