This is a high quality vector illustration by Hydro74. This piece, is fully editable and comes as either a Illustrator CS3 AI file, or a Illustrator 10 EPS file. This file includes: A detailed tattoo-inspired skull. C’mon it’s on 5 bucks! Grab it and use it. 
The License Agreement is simple. Free to use as desired and Royalty Free when used in projects. However no selling or redistributing is allowed.