The snap button is usually composed of four parts, the AB part is called the female buckle, and the CD part is called the male buckle. According to the style, the snap buttons can be divided into: large white buttons, fisheye buttons, plastic snap buttons, plastic snap buttons, drill snap buttons and so on. According to the buckle surface, the snap buttons are generally divided into: glossy snap buttons, flower surface snap buttons, diamond snap buttons, fisheye snap buttons and so on. According to the material, the snap button is generally divided into: copper snap button, alloy snap button, resin snap button (also known as plastic snap button), plastic snap button and so on. According to the type of wind used in clothes, it can generally be divided into coat snap buttons, shirt snap buttons, down jacket snap buttons, trouser hook snap buttons, hat buckles, bracelet buckles and so on. The model of the snap button is usually determined by the size of the lower three pieces, and the surface of the snap button (A piece) can be changed at will, but the lower three pieces generally have their general rules.