The screw is made of high-grade carbon steel with a surface hardness of 500-550HRC, offering strong toughness. It is suitable for use in wood after pre-drilling, providing sturdy and durable performance. The screw features a galvanized surface for rust and corrosion resistance. The pointed head allows for easy penetration into wood and plastic materials, including hardwood. Item Name: Screws Quantity: 100 Pieces Material: Carbon Steel Surface Treatment: Galvanized Features: Durable, Self-tapping, Rust Resistant Length Options: 32mm (1.26"), 38mm (1.50"), 50mm (1.97"), 63mm (2.48") (Approximate) Note: The quantity is approximately 100 pieces. Due to manual counting, there may be a 1-3 piece variance. Slight color variations may occur due to lighting and screen settings. Slight dimensional differences may occur due to manual measurement. Package Includes: 100 x Screws