Ah, the 'ole knurled nut.  Every Interceptor owner whether Saloon or Convertible comes to know the 'knurled nut'! No matter, these guys retain your parcel shelf (7 each) and rear lamp access trim pieces (4 each) in the Saloons and only on the rear lamp access trim panels in the Convertible.  And for you Coupe owners, you use two additional ones to hold up your tool panels in the boot lid.