[Exquisite Material]The black round screws are made of high-quality carbon steel material. The black cover can help protect the screws from the harm of rust. These pan head screws feature strength and good corrosion resistance, and have superior rust resistance and the excellent of oxidation resistance.[Cross Head Design]Compact thread of these M3 M4 self tapping screws is not easy to out of shape and id in the process of rolling, easy to use, install, and easy carry. Standard cross-ot design, uniform force, easy to lock, quicker and more convenient to use.[Portable Plastic Case]Our assorted black screws are arranged in neat in a transparent mesh plastic box for easy storage and portability. This storage box features compartments, which keep the cross head wood screws organized and ready to use.[Wide Applications]The precision threads of our countersunk screws can easily traverse various materials such as plastic, wood, soft metal, and others. Suitable for door handles, machine industry and other small repairs around the shop.[What You Will Get]You will get 240 pcs mixed screws pack, the size of M3x 10mm/12mm/20mm/25mm, and M4x 12mm/16mm/20mm/25mm, which are enough for your daily use. perfect tool for professionals, amateurs, repairmen, woodworking, etc.Colour:blackMaterial:Carbon steelSize:17.7 x 10.2 x 2.4 cmPackage Contents:30 x M3 x 10 Screws30 x M3 x 12 Screws30 x M3 x 20 Screws30 x M3 x 25 Screws30 x M4 x 12 Screws30 x M4 x 16 Screws30 x M4 x 20 Screws30 x M4 x 25 Screws1 x PP Storage BoxOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm."