This all purpose plate is made from non-corrosive, black powder coated steel. It is ideal for various applications such as joining lengths of Heavy Duty bar together in a T junction to branch off from your roof bars longitudinally or in a right angle, can be placed at the middle or end of a Rhino-Rack HD bar, coupling bars to extend the length of your bar longitudinally while maintaining the same plane level and creating additional useable holes to attach items outside of your bar system. Setting up roof rack bars in custom configurations has never been easier. The T Shape Steel Fitting Plate can also be attached to the Rhino-Rack Vortex bar.