The standard structural pivot assembly with straight and "L" arm comes preassembled with the pivot arms connected to the nub and includes the hardware to connect the nub to the mounting profile. It consists of one 0 degree, 90 degree or universal structural pivot nub, one standard straight structural pivot arm and one "L" structural pivot arm.
For technical details and images, please search for the product using the 80/20 interactive catalogue found here: https://catalogs.8020.net/80-20-Catalog-26/C/.