Rod is a long, cylindrical piece usually made of metal or plastic material. There are various types used in different industries. It is widely used especially in the construction, automotive, electrical and machinery industries. While metal rods are generally made of materials such as steel, aluminum or brass, plastic rods are generally manufactured from materials such as polyethylene, polypropylene or nylon.

Rods can be of different diameters, lengths and thicknesses, allowing them to be designed to meet different requirements for various applications. For example, while steel bars used in the construction industry are generally used in creating building frames or strengthening reinforced concrete structures, aluminum bars used in the automotive industry are generally preferred in the production of vehicle bodies and parts.