... Product introduction : Item Name Stainless steel wafer head drilling screws , decorative screws Material1.Stainless steel:303/304 ... finish , Anodizing , OxidationOperationCNC machine , Lathe machine , Milling machine , Drilling machine , Planning , Grinding , Boring , Wire-electrode cutting ,and tappingQuality ... manufacture for more than 6 years.1. Quality control :The defective products rate is 0.1%. ...