This is a large-headed automatic screw developed for a renowned domestic telescope company. It serves as an adjustable screw for manual adjustment. The design challenge of this product lies in its large head, requiring a smooth surface without knife marks or burrs, and demanding high surface treatment standards. We collaborated with a surface treatment factory for over a month, conducting more than 20 trials, before successfully developing this product. It boasts smoothness, non-slip properties, and high wear resistance.