This 29 piece Thinlits die set, Trick or Treat Colorize, is designed by Tim Holtz for Sizzix and is part of the Halloween Collection. This die set features all the pieces needed to make a detailed eyeball, a piece of candy corn, a skull cookie, and a candied apple. This die set is designed with Colorize technology, which is an intricate paper layering technique. These Thinlits dies are wafer-thin, chemically-etched dies that are designed to cut, emboss, or stencil a single sheet of cardstock, paper, metallic foil, or vellum. These dies are compatible with leading die cutting machines (sold separately). These dies can be used for cards, scrapbook pages, tags, journals, planners, invitations, and other paper crafting, mixed media, and home decor projects.