According to the inquiry, the binder is a kind of office supplies, which usually consists of a plastic or leather shell and several detachable ring clips. The size and shape of binders can be customized according to different needs, but they are generally rectangular. Usually, the shell of binder has many colors, such as black, white, blue and red. There are one or more ring-shaped clips inside the shell, which can be opened and closed to facilitate users to insert files or papers into them. The number and size of clips can also be adjusted as required.
A binder is a kind of stationery that can bind and disassemble paper conveniently and freely. After the cover and paper are pasted, it is a loose-leaf book. Usually, loose-leaf books without paper are also called bound books.