Autoart - Centre Lock Racing Toilet Paper Holder Features This centre lock wheel nut design with a lockable cover can only be found on the most exotic sports cars, such as the F50, Enzo and the MC12. With the same dimensions as a real centre lock wheel nut measuring 10 cm (4”) in diameter, this novel ashtray has a cover that can swing open in both directions for easy access and the concealment of unsightly smoking debris. It has three slots to hold various sizes of cigarette and one larger slot for cigars. Made of precision machine-cut billet aluminium, this stylish ashtray will be the envy of guest users.