One-piece tamper proof anchor Black Parma-Seal Coated Also for use with Treated Lumber ZINC PLATED FOR INTERIOR CORROSION PROTECTION: Constructed from durable steel with a zinc-plated finish, these anchors provide moderate resistance to rust and corrosion, making them suitable for interior construction and installation environments. TRUSTED HILLMAN FASTENING SOLUTIONS: Hillman hardware products are engineered for consistent quality, dependable performance, and reliable fastening across construction, repair, and home improvement applications.