The Screws Flat Head 5/8" 63Pc is a set of 63 flat head screws, each measuring 5/8 inch in length. Flat head screws are designed to sit flush with the surface of the material, providing a smooth finish. These screws are commonly used in woodworking and other applications where a flush surface is desired. The specific drive type and material composition can vary depending on the manufacturer. For instance, some flat head screws feature a Phillips drive and are made from zinc-plated steel for durability.