Chrome Series Adjustable Right angle Clamp
Gibraltar's SC-GCARA is designed to connect two 1 1/2" pipes together in-line with each other.
The adjustable part of the clamp has a geared ratchet tilter that allows you to change the positioning of the clamp so that it angles the bar in a different direction. So if you don't want your bar mounted straight up, you can mount it off at an angle which opens up endless possibilities.
This clamp works well when attaching cross bars to verticals and positioning at odd angles.