Description:1. Material: These screws are made of 304 stainless steel, bright finished, which is corrosion-resistant metal, they last longer than other hardware.2. Advantage: Our Self-Tapping screws are very strong and are great for both indoor and outdoor use. This stainless is superior to regular steel and provides excellent rust resistance.3. Feature: Bolt stainless hardware is great to have around for use in wet environments. They are strong, corrosion-resistant, and will support all of your projects.4. Application: Wind power industry, the aerospace industry, office equipment industry, the electronics industry, the communications industry, shipbuilding industry, etc.Specification:Product Name: Self-Tapping Screws BoltsColor: Silver ToneMaterial: 304 Stainless SteelFinish: BrightModel: #12x1/2"Rod Length: 13mm / 0.51"Screw Head Size: 11 x 4mm / 0.43" x 0.16"Screw Groove Type: PhillipsPackage Content:50pcsx Self-Tapping Screws