• High-quality carbon steel screws, corrosion-resistant, do not rust or deform easily. • Cross flat head design that maximizes torque and provides a firm grip. • Efficient drilling and fastening, ideal for woodworking, repairs, and maintenance. • Wide range of applications in wood, soft metal, plastic, and rubber. • Includes 400 pieces: 60 pieces M3x12mm, 60 pieces M3x20mm, 40 pieces M3.5x12mm, 50 pieces M3.5x16mm, 40 pieces M3.5x25mm, 40 pieces M4x10mm, 50 pieces M4x12mm, 30 pieces M4x16mm, 30 pieces M5x12mm. • Stored in a box for easy access and organization.