![skull skull](http://designchair.co.uk/wp-content/uploads/2011/04/skull.jpg)
![](http://designchair.co.uk/wp-content/uploads/2010/12/clicktoviewtutorial9.jpg)
The skull and crossed pistons mark is a popular adaption of the tradition skull and crossbones symbol and is commonly seen in motorcycle culture, amongst other. Follow this Adobe Illustrator tutorial to create your own underground skull & crossed pistons graphic