Hi guys, Welcome to the Advanced Video Search Engine, and you are watching Triangular Plunge Drill Bits, Unconstrained 3D Aluminum Cutting Performance. That video is uploaded by Nine9 Cutting Tools 耐久切削工具 at 2020-10-21T16:59:56-07:00. We are promoting this video only for entertainment and educational purpose only. So, I hope you like & enjoy it. [BXzfPIfXgrE]