Crafters and button makers, this ChiButtons set has everything you need to create 300 professional-looking pin badges! Each 32mm set includes the metal upper shell, protective Mylar sheet, and pre-assembled pin back with safety pin already attached. The metric system sizing means they're 32mm in diameter with a suggested pattern size of 44mm to fit perfectly. The metal construction gives your badges that quality weight and durability that plastic ones just can't match. Whether you're making promotional items for your business, fundraising for school or organizations, creating custom gifts, or just expressing your creativity, these components make the process super easy. The pre-pinned backs save you time and frustration during assembly, and the quality materials mean your finished badges will hold up to regular wear. They're perfect for jackets, backpacks, hats, lanyards - anywhere you want to show off your designs. At 300 sets per package, you've got plenty to work with for big projects or to stock up for future creations. If you're tired of flimsy badges that break easily or want to take your button-making to a more professional level, these metal components deliver that quality finish that makes your designs look store-bought rather than homemade.