The 3 hole – center tap base plate is made of anodized aluminum to withstand daily use and wear and tear. It mounts leveling feet and threaded stem casters, and is commonly used on a rectangular profile end to center mount the foot or caster. The 3 hole – center tap base plate can also be used on a profile side. It requires a tap to mount to a 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/.