Individual items to to make up push button poppers which can be found on boat hoods and fabric covers. A combination of the four items is required to make a complete popper set.
The push button is used to secure the socket to fabric completing the button.
The socket is used to secure the push button to the stud when pushed together.
The stud is used to secure the popper and can be used on it's own when attached to a hard surface using a self tapping screw or in conjunction with the backing when attaching to fabric.
The popper backing is used in conjunction with the stud when attaching to fabric.