Specifications: The Carbon Steel Grub Screw features a hexagonal head and is made of high-strength carbon steel. Its oxidation surface provides excellent resistance to extension and corrosion in various environments. This screw is ideal for use in confined areas, such as fastening components, industrial and construction fasteners. Its size is M14*20mm and 10 pieces are included in the package. Note: Please keep away from children and babies and avoid swallowing.