This 85° elbow is conical and welded together for a perfect fit. Very usable for longer overhangs where you need to get back onto a wall, or vertical area to continue down. It has the same 2" overlap as the rest of the system making it very easy to install. Two 85 degree elbows together, gives you approximately 12" of offset. There is no need for caulking or putting any rivets or screws into the system. In most other systems caulking and putting screws in the flow of water results in debris being clogged, increasing the risk for leaks.