From a garage clearance with other Jaguar parts, accessories and literature..see my other listings for more. I'm guessing unused and they certainly look it...no signs of anything in the threads to suggest fitment. Chrome is good on all. 1/2" measure across the flat. See photos. Useful and useable...good spares to carry or for engine rebuilds. Multiple buy discount too. Priced to sell so grab a bargain. Dispatched with Royal Mail large letter. Padded envelope.  Will post international. Just please ask me about postage first especially if you want to use Royal Mail international.