All kits are hand-selected by Pierre Finkelstein for their usefulness and efficiency in creating the specific technique listed as the product name. There are several levels to the brush kits, depending on the cost and number of brushes desired for purchase. The Intro Kit is the smallest-sized kit that is good for entry-level use. The Standard Kit is a medium-sized kit that will give you most of the brushes needed for the specific technique. The Full Kit is our largest kit option and has the largest amount of the necessary brushes for that technique.