Size: The diameter of metal snap rings is approx. 9.5mm/0.37"Quantity: 20 sets,Easy to store: 20 sets of snaps are placed in a transparent storage box with a removable bezel. You can conveniently store or carry itMaterial: The metal snaps buttons are made of copper, well-made, sturdy and high quality, which will last very long and the snap fastener pliers are made with high-quality aluminum, ideal for professional and novice tailorsWidely application: Use these handy plastic snaps for your jumpsuits, nappies, bathtubs, towels, kid's clothing, quilt covers, curtains, raincoats, umbrellas, folders, crafts, etc. Also can be applied for DIY crafts, or making clothes such as shirts, jackets, backpacks, clothes, hats,and so on