The Gibraltar SC-GRSSRA Road Series Stackable Connection Clamp is the perfect solution for connecting rack tubes when creating an angled mounting point. Featuring a black-coated metal design, it connects a horizontal rack tube to a vertical tube, and with another clamp two horizontal pipes can be mounted on a vertical pipe for a 90° pivoting angle. The clamp fits rack tubes with a 1.5" diameter, so you can create a stable and secure mounting point for your racks.