Adjustable Fittings allow for creating a desired angle for your project.  The fittings are adjusted by tightening and loosening a bolt which is located at the joint. There are special ridges on the mated surfaces of the arms which allow for an immovable joint once the bolt is tightened.  Many applications include greenhouse ridges, adjustable arms on props, and custom angled frames. 

Circo Adjustable Joint fittings are available in Furniture grade. These fittings are not for flowing water.