Grip-Rite Exterior Coated Star Drive & Trim Head screws are engineered with our exclusive PrimeGuard Plus premium coating – guaranteed against rust and corrosion to prolong the beauty and durability of decks, siding, fencing, railing, and other outdoor projects. Grip-Rite Exterior Screws feature T25-T30 star drive heads to reduce cam outs when driving into your outdoor project.