The FBFZ flat rail bracket by Simpson Strong-Tie offers a more concealed install look and features ZMAX(R) galvanized finish for enhanced durability. In addition to fence-rail connections, the FBFZ can also be used for handrail attachments for porch and deck railings that are 30 inches or closer to ground level. For installation, follow these simple steps: position the bracket on the end of the 2 inches x 4 inches rail. Install fasteners into all three center holes. Slide the rail into place against the post or another wood member. Then, install one fastener through both the top and bottom holes into the post.