Simpson Strong Tie APB88R Decorative Post Base for 8x8 Rough Cut Posts Black Powder Coat, ZMAX Stainless Steel Large Diameter Masonry Screws Self Drilling Point: Eliminates the need Self Drilling Point: Eliminates the need for pre drilling by cutting directly into metal substrates for faster installation The LSTHD8 installs by securing the strap to the wall stud assembly and anchoring the holdown to the supporting foundation or framing member using approved fasteners and anchor bolts per Simpson Strong Tie installation guidelines If you have a nominal post measuring 7 1 2" x 7 1 2" you will need an APB88 Ornamental Post base The Simpson Strong Tie APB Adjustable Post Base is part of the Outdoor Accents Mission Collection