Resin four-button is usually called plastic snap, widely used in answer bags, paper bags, umbrellas, bags, packaging and clothing. Brief description of the four-button: the conventional four-button has four parts, two nails, one male female, which need to be installed with tools (not included). Features - ColorAssorted Color - Material: Plastic. - Size: About 17.50X13.50X3.50cm/6.88X5.31X1.38inch. - Perfect for shirts, jeans, jackets, bags and other crafts. - Adopted from material, it is durable and use. - Now that you have them, start your creation, you can imagine and create unique crafts, every piece of clothing will have your own design. - If you were to DIY some clothes, bags or other sorts of items, these press studs are indispensable. - The is and would not cause health issues. Package list: 360 Sets x Plastic Button (24 Colors)