An electric engraver like the Dremel® 290 is a fantastic, affordable way for a beginner to get started in fossil prep. No compressor required! The Dremel® 290 is a popular choice in fossil preparation. Amazing work can be done with an electric engraver, for a fraction of the price of air tools. Our 3 styles of tungsten carbide fossil preparation styli fit the Dremel 290, and some other electric engravers (but not all).