It includes 2pcs of cold shoe, and it could attach camera accessories with 1/4" and M2.5 threads, such as cage, cold shoe block and so on. It enables to mount on camera lights, shoe handles, microphone and more for additional attachment. The counterbore hole in the center is attachable to 1/4'' screw, but the 1/4'' screw will not touch the hot shoe contact of accessories mounted on the cold shoe.