The Delta 3-Way Shower Arm Diverter is the perfect way to build your own Dual Shower Head. Simply attach the external Shower Diverter to your Shower Arm and then you can add your ideal shower heads.
You can either attach the Handshower Hose to the bottom of the Diverter and hang the Handshower on a Wallmount Shower Holder Bracket. Or, you can rotate the Diverter so that the bottom threads are facing towards the side of the Shower Wall and attach a standard Shower Holder Bracket to those threads for a more "traditional" set up. Either way works great!