Drive Style: Torx TTAPHead Type: StarHead Finish: Lava RockMaterial: Stainless SteelContainer Size: 224 per boxThread Type: CoarseSelf Tapping: YesCountry of Origin: TaiwanWeight: 2.9 lbs.FeaturesFor use with trex transcendCortex for trex hidden fastening system is the fastest, easiest way to hide the heads of your deck screws on the marketCortex offers a strong connection between the deck board and the joistOne kit does 100 square foot at 16 inch224 screws/300 plugs224 Per Box SpecificationsLength: 2-3/4 in. Torx TTAP Star Head Lava Rock Stainless Steel Hidden Deck Fastener - 224 Per Box With the continued vision to be the best, most helpful hardware stores on the planet, Ace Hardware and its retail associates remain dedicated to the core value of quality for its customers.