In this video, we take you inside Dongguan Yue Lin Sen Metal Technology's ISO-certified facility to show how stainless steel medical three-edged and double-edged needles are machined. Watch a step-by-step walkthrough of precision CNC turning, laser-cut capillary tube processing, and secondary operations like tapering, capping, and bending—all within a 100,000-grade cleanroom. See real production insights for B2B buyers sourcing custom non-standard medical instrument parts.