Now made obsolete with the introduction of the Clark Ultra accessory. https://www.theokspindoctor.com/product-p/ultrabar.htm 20" Fulcrum Support Tube used to stabilize the hollowing bar for hollowing beyond 20" deep. Powdercoated to the color of your choice. Includes the grease fitting. Suggested to be used with extra long hollowing bars beyond the standard 48" long bar.