This 21 piece stand-alone Doodle Cuts thin metal die set, Playful Puppies, is part of the Doggone Cute Collection from Doodlebug Design. This die set features four different dogs, a tennis ball, and a branch. These dies are compatible with leading die cutting machines (sold separately). These dies can be used on cards, scrapbook pages, tags, journals, planners, and other paper crafting projects.