The o'bars are a mix of your favorite oil paints and wax, specially prepared to give you unlimited power. The o'bars can be used directly to draw, and you can even mix them while drawing too. Add a little Medium at any moment of the process and you are ready to paint! Like Impastos? Well, forget the Medium then, just work your paint around with a brush, or palette knife, o'bars, your fingers or... be creative! 
The power is in your hands now.