If you are talking end to end, you do not want to butt them together. The joint will fail. If you want to turn one down and insert it in the other, that can be done and glued in several different types of configurations of length. From a basic two peice of a dowel going into a head, or what ever other combo you can imagine.
I have also done what was stated above, so a striker could be played half and half by spinning it 180 degrees.