Caution: Phosphate, Yellow Zinc and Zinc coated fasteners are not recommended for exterior use or with treated lumber. Galvanized fasteners are not recommended for use with cedar or redwood. Tannic acid found naturally in these wood types may cause surface staining and/or streaking. All steel screws may rust and cause streaking and/or staining over time depending on the application. If possible streaking or staining is unacceptable use Fas-n-Rite exterior wood screws, or Deck Plus exterior polymer coated or stainless steel fasteners. Wear safety goggles. Protect your eyes, wear safety goggles. Do not put screws in mouth.