Pro Series extension set is a five-piece unit designed to hold the Pro Series gong, mark I or mark II in the Taylor Targets Pro Series base with the use of 2 x 4 in, purchase independently. The extension set allows the customer to raise the height of the target to your specific need. Using this method to hang the targets provides you a solid support for the target. The Extension set consist of two sets of hanger brackets, a stabilization bar and a set of chain.