Metal button

The invention discloses a metal button, which comprises positioning clips, a left half button body, a right half button body and a connecting shaft, wherein the right half button body is provided witha convex part; the left half button body is provided with a concave part cooperating with the convex part; a width of the concave part is more than that of the convex part; the connecting shaft is arranged in the concave part; further, two ends of the connecting shaft are both fixedly connected with the left half button body; the convex part is provided with a first through hole along a width direction of the convex part; the right half button body is connected with the connecting shaft through the first through hole; the right half button body is also provided with a threaded through hole; one end of the threaded through hole is communicated with the first through hole; the other end of the threaded through hole is communicated with an external environment; the positioning clips have a quantity of two and are fu