The narrow horizontal stanchion base is commonly used with the aluminum tube profile to create an additional axis. The tube extends parallel from both sides of the mounted base. The base is aluminum, making it a strong and durable option. Clamp screws are included. The suggested hardware to mount the base to a T-slot can be found on the "Suggested Hardware" tab.
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/.