Hey crafters and button enthusiasts! This ChiButtons kit has everything you need to make 300 professional-looking pin badges. Each 58mm set includes the metal upper shell, protective Mylar sheet, and metal pin back with safety pin already attached - seriously, they thought of everything. The metal parts feel quality and durable, not cheap or flimsy like some button kits. Perfect for making custom pins for events, campaigns, schools, or just for fun personal projects. The 58mm size (that's about 2.25 inches for us non-metric folks) is that classic pin badge size that works great on jackets, backpacks, hats, you name it. Assembly is super straightforward - just pop your design between the pieces and use a button press (sold separately). The pre-attached safety pins are a nice touch that saves time and frustration. With 300 sets in the package weighing about 3.2kg, you've got plenty to work with for multiple projects or events. The components are precisely designed to work with ChiButtons button makers specifically. Whether you're making promotional items, fundraising pins, or just fun accessories for friends, this kit gives you professional results without the professional price tag. The metal construction means these badges will actually last through regular wear without breaking or looking worn out quickly. Definitely a solid choice if you're serious about button making!