Durable steel construction: Made from 4 mm thick steel with a black powder coating for superior rust resistance. These post anchors withstand harsh weather and deliver long-term durability and performance. Universal compatibility: Four holes on the body and four on the base for versatile installation options. Includes expansion bolts and self-tapping screws for easy mounting to wood or concrete surfaces, covering a range of installation needs. Effortless setup: Simply place the post base on your chosen surface, drill holes for expansion bolts, insert the wooden post, and secure with screws for a quick, stable installation. Wide application range: Compact design ideal for securing posts for decks, fences, railings, signs, and mailboxes, providing dependable support for a variety of outdoor projects. Use scenarios: - Securing deck posts for a sturdy railing or frame - Anchoring fence posts to define property boundaries - Installing mailbox or sign posts along driveways or entryways