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.