The leveling caster base plate is made of anodized aluminum to withstand daily use and wear and tear. It bolts to a profile end or side and is commonly used to mount heavy-duty casters for an added layer of strength and durability. It requires a tap to mount to the profile end.
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/.