The SYM-IB-EXT Symmetry Interface Bar Extension is a set of two metal bars, which can join two Symmetry interface bars together to increase its overall bar length. These extension bars are designed to be easy to install with minimal tools, allowing installers to create extended Symmetry interface bar lengths. - Connects two Symmetry Series Interface Bars to achieve the optimum overall bar length - Easy to install using the included M4 Allen Key