Premium: copper sheet, not easy to rust and : You can fill up with resin, glitters, rhinestones, pearls, charms, cabochons Occasions: Perfect for jewelry making & craft projects, such as pendant earrings, necklaces Easy to use: Suitable for lovers or beginners; They can be combined with nail gel, hair gel or glitter to use Easy to match: These fillings would work well for all kinds of projects, easy to work They can serve as an decoration or fillings in phone cases, books, wallet, shoes, jewelry making, greeting cards