Feature: 1. With high strength and good durability, these screws can be suitable for various sizes. 2. Made of high-quality carbon steel Q215 materials, such cross screw can be easy to install. 3. Installed on many different types of materials, such self-tapping screw can be easily used. 4. Wide applciation helps these cross screw use in home decoration, construction, industry, etc. 5. 410PCs screws can meet your different needs, and they can be suitable for long term use. Specification: Item Type: Self-tapping screws Head Type: Round head Slot Type: Cross Sizes (mm): M3x12, M3x16, M3x20, M4x12, M4x16, M4x20, M5x12, M5x25 Working Mode: Self-tapping Thread Tolerance: 4h Nominal Length: Approx. 3 ~ 10mm / 0.12 ~ 0.39in Material Grade: Carbon steel Q215. Package List: 80 x (M3 x 12) Self-Tapping Screw70 x (M3 x 16) Self-Tapping Screw65 x (M3 x 20) Self-Tapping Screw60 x (M4 x 12) Self-Tapping Screw50 x (M4 x 16) Self-Tapping Screw40 x (M4 x 20) Self-Tapping Screw25 x (M5 x 12) Self-Tapping Screw20 x (M5 x 25) Self-Tapping Screw