All shoe bases must be purchased with corresponding flagpole. Please contact us for any questions. Simply select the diameter that matches the butt dia. of your pole. The tilting aluminum base is welded on for stability and durability and eliminating the need for a flash collar. The hinged portion of the base is held in place by (3) stainless steel, Allen head bolts and pivots on a solid aluminum pivot rod. Anchor bolts are furnished for mounting to a concrete base. ⚠ Prop 65 WARNING