Hillman Joint Fasteners 5/8 In. are thin corrugated strips of steel designed to be hammered into wood joints to securely fasten them. Featuring a sharp side, these fasteners are driven directly into the wood, making them highly effective for joining mitred joints. As one of the most common types of joint fasteners, they provide a reliable and sturdy connection for woodworking projects, ensuring durability and strength in your constructions. Model Number: