Product Description He PB base embeds in wet concrete after pour and is made to install flush with the concrete surface. This product gives strong uplift and lateral load to the post connection. The embossment in the seat of the base gives increased strength. Stress relief holes under the base resist tearing during loading. From the Manufacturer he PB base embeds in wet concrete after pour and is made to install flush with the concrete surface. This product gives strong uplift and lateral load to the post connection. The embossment in the seat of the base gives increased strength. Stress relief holes under the base resist tearing during loading.