Pergola Foot Anchor (Single)GROUND ANCHORED FOOTINGS IN MINUTES ARE A REALITY The Pergola Foot Anchor is a ground breaking foundation solution for your pergola build. The auger drives deep into the soil using a standard impact wrench, creating a stable footing without the need for digging, mixing, or pouring concrete. Each anchor includes a helical auger, your choice of a flat or convex load plate, and self tapping metal screws to easily secure a post base directly to the plate.