Abstract: The end of a first member is fastened to the side of a second member via a releaseable rod. One end of the rod is threaded into a socket fixed in the side of the second member; the other end of the rod extends into a bore in the end of the first member. An internally threaded second socket is positioned in a transverse bore in the first member and said other end of the rod extends through the second socket. A conically ended setscrew is threaded into the second socket and engages a deep conical recess in the side of the rod. Upon tightening the setscrew, the end of the first member is pulled tightly against the side of the second member via the wedging action of the setscrew in the recess.