The Simpson Strong-Tie® ABU is designed to attach wooden posts to existing concrete in high capacity applications. The built-in 1-in. standoff of this adjustable post base helps to prevent rot at the end of the post. The ABU has a slotted anchor hole in the base for adjustability and attaches to the post with nails, Strong-Drive® SD Connector screws or bolts. This versatile post base makes a cost-effective option for securing a post to the foundation, with a design built for maximum uplift performance. ABU ZMAX® Galvanized Adjustable Post Base for 10×10 Rough (Pack of 60).