About Product:UMBRELLA HEAD ROOFING NAIL are generally used to connect wooden components with a length of 4-8cm.The main material is carbon steel.To understand its own characteristics, and then operate according to its own characteristics. For corrugated nails with bare body, ring pattern and square shape, it can be used directly, while spiral corrugated nails need to be screwed, which is not easy to use directly. When you use it, you can customize it according to your own needs, so that you can achieve the desired fixed effect