VEVOR 4x4 Post Base 8 Pcs, Inner Size 3.6x3.6 inch / 92x92 mm Post Brackets, Heavy Duty Carbon Steel Decking Posts, Wood Posts Brackets for Pavilion Deck Railing Support Deck Base Plate, Black
For a wood base, you can typically secure the bracket with wood screws. Expansion sleeves/anchors are only needed when mounting to concrete or masonry.
