- Set of 20 Chicago screws M4 x 5.5 mm made of 304 stainless steel, resistant to rust and corrosion - Matte black zinc finish that enhances wear resistance and provides a professional look - Hexagonal head for easy torque application and effortless installation - Deep and precise threading for maximum grip and stability in furniture and DIY projects - Includes 1 wrench for quick and easy assembly - Measurements: female 5 x 7 mm, male M4 x 5.5 mm, head 8.5 mm diameter - Versatile use: ideal for fastening and connecting furniture parts, leather crafts, clothing, albums, bags, beds, tables, and cabinets - Easy installation: simply drill the appropriate hole and tighten with the included tool - Professional solution to optimize the assembly and durability of your hardware projects