The screw is made of high-grade carbon steel, surface hardness of 500-550HRC, has strong toughness.It is suitable for screwing woodworkers after drilling holes, sturdy and durable. The surface of the screw is galvanized, anti-rust and corrosion resistant.Screw head is pointed, easy to drill into wood and plastic, can used for hardwood. Item Name: ScrewsQuantity: 100PcsMaterial: Carbon SteelSurface Treatment: GalvanizedFeatures: Durable, Self-tapping Screw, Anti-rustLength: 32mm/1.26", 38mm/1.50", 50mm/1.97", 63mm/2.48" (Approx.) Notes:The quantity is about 100pcs, due to manual calculation, the quantity might has 1-3pcs error, hope you can understand, thank you.Due to the light and screen setting difference, the items color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement. Package Includes:100 x Screws